/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:03:33,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:03:33,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:03:33,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:03:34,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-06 00:03:34,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:03:34,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:03:34,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:03:34,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:03:34,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:03:34,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:03:34,076 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:03:34,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:03:34,076 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:03:34,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:03:34,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:03:34,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:03:34,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:03:34,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:03:34,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:03:34,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:03:34,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:03:34,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:03:34,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:03:34,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:03:34,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:03:34,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:03:34,449 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:03:34,450 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:03:34,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-06-06 00:03:34,451 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-06-06 00:03:34,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:03:34,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:03:34,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:03:34,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:03:34,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:03:34,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:03:34,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:03:34,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:03:34,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:03:34,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... [2021-06-06 00:03:34,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:03:34,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:03:34,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:03:34,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:03:34,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:03:34,610 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:03:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:03:34,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:03:34,611 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:03:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:03:34,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:03:34,612 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:03:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:03:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:03:34,612 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:03:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:03:34,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:03:34,614 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:03:34,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:03:34,863 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:03:34,864 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:03:34 BoogieIcfgContainer [2021-06-06 00:03:34,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:03:34,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:03:34,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:03:34,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:03:34,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:03:34" (1/2) ... [2021-06-06 00:03:34,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a270f3 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:03:34, skipping insertion in model container [2021-06-06 00:03:34,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:03:34" (2/2) ... [2021-06-06 00:03:34,884 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-06-06 00:03:34,888 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:03:34,888 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:03:34,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:03:34,889 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:03:34,960 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:03:34,992 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:03:35,008 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:03:35,008 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:03:35,008 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:03:35,008 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:03:35,008 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:03:35,008 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:03:35,008 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:03:35,009 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:03:35,016 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-06 00:03:35,031 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-06 00:03:35,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:35,041 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:35,041 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-06 00:03:35,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:35,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131998016] [2021-06-06 00:03:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:35,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:35,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131998016] [2021-06-06 00:03:35,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131998016] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:03:35,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:03:35,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:03:35,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255706290] [2021-06-06 00:03:35,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:03:35,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:35,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:03:35,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:03:35,250 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:35,296 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-06 00:03:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:03:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-06 00:03:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:35,312 INFO L225 Difference]: With dead ends: 217 [2021-06-06 00:03:35,312 INFO L226 Difference]: Without dead ends: 202 [2021-06-06 00:03:35,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:03:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-06 00:03:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-06 00:03:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-06 00:03:35,370 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-06 00:03:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:35,371 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-06 00:03:35,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-06 00:03:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:03:35,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:35,373 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:35,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:03:35,373 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:35,374 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-06 00:03:35,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:35,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097260453] [2021-06-06 00:03:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:35,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097260453] [2021-06-06 00:03:35,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097260453] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:03:35,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:03:35,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:03:35,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870997859] [2021-06-06 00:03:35,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:03:35,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:35,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:03:35,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:03:35,417 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:35,471 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-06 00:03:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:03:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:03:35,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:35,477 INFO L225 Difference]: With dead ends: 158 [2021-06-06 00:03:35,478 INFO L226 Difference]: Without dead ends: 158 [2021-06-06 00:03:35,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:03:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-06 00:03:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-06 00:03:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-06 00:03:35,493 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-06 00:03:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:35,494 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-06 00:03:35,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-06 00:03:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:03:35,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:35,503 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:35,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:03:35,503 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-06-06 00:03:35,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:35,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462488231] [2021-06-06 00:03:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:35,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:35,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462488231] [2021-06-06 00:03:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462488231] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:03:35,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:03:35,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:03:35,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074855836] [2021-06-06 00:03:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:03:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:35,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:03:35,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:03:35,580 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:35,646 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-06 00:03:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:03:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:03:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:35,648 INFO L225 Difference]: With dead ends: 183 [2021-06-06 00:03:35,649 INFO L226 Difference]: Without dead ends: 183 [2021-06-06 00:03:35,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:03:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-06 00:03:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-06 00:03:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-06 00:03:35,667 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-06 00:03:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:35,667 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-06 00:03:35,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-06 00:03:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:03:35,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:35,670 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:35,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:03:35,670 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-06 00:03:35,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:35,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351880428] [2021-06-06 00:03:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:36,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351880428] [2021-06-06 00:03:36,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351880428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678685070] [2021-06-06 00:03:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:36,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:03:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:03:36,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:36,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:03:36,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:36,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:03:36,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:36,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:36,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:03:36,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-06-06 00:03:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:36,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678685070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:36,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:36,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:03:36,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327169691] [2021-06-06 00:03:36,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:03:36,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:03:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:36,601 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:36,891 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-06 00:03:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:03:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:03:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:36,895 INFO L225 Difference]: With dead ends: 330 [2021-06-06 00:03:36,895 INFO L226 Difference]: Without dead ends: 315 [2021-06-06 00:03:36,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:03:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-06 00:03:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-06 00:03:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-06 00:03:36,923 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-06 00:03:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:36,923 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-06 00:03:36,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-06 00:03:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:03:36,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:36,925 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:37,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:37,141 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-06 00:03:37,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:37,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360346231] [2021-06-06 00:03:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:37,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360346231] [2021-06-06 00:03:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360346231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:37,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309623012] [2021-06-06 00:03:37,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:37,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:37,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:37,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:03:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:37,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:03:37,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-06 00:03:37,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:37,871 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:03:37,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-06 00:03:37,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:37,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:03:37,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:37,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:37,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-06 00:03:37,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:37,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:37,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:03:37,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-06-06 00:03:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:38,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309623012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:38,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:38,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-06 00:03:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484081224] [2021-06-06 00:03:38,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:38,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:38,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:38,110 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:38,566 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-06-06 00:03:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:38,758 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-06 00:03:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:03:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:03:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:38,761 INFO L225 Difference]: With dead ends: 374 [2021-06-06 00:03:38,761 INFO L226 Difference]: Without dead ends: 359 [2021-06-06 00:03:38,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 869.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:03:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-06 00:03:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-06 00:03:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-06 00:03:38,771 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-06 00:03:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:38,771 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-06 00:03:38,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-06 00:03:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:03:38,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:38,773 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:38,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:38,989 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-06 00:03:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:38,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270457725] [2021-06-06 00:03:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:39,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:39,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270457725] [2021-06-06 00:03:39,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270457725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:39,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561338248] [2021-06-06 00:03:39,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:39,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:03:39,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:39,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:03:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:39,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-06 00:03:39,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:03:39,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:39,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:03:39,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:03:39,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:39,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-06 00:03:39,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:39,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:03:39,423 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:39,459 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-06 00:03:39,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:03:39,460 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-06-06 00:03:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:39,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561338248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:39,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:39,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:03:39,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294062186] [2021-06-06 00:03:39,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:03:39,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:03:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:03:39,516 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:39,700 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-06 00:03:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:03:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:03:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:39,703 INFO L225 Difference]: With dead ends: 296 [2021-06-06 00:03:39,703 INFO L226 Difference]: Without dead ends: 281 [2021-06-06 00:03:39,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:03:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-06 00:03:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-06 00:03:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-06 00:03:39,710 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-06 00:03:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-06 00:03:39,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-06 00:03:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:03:39,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:39,712 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:39,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-06 00:03:39,925 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-06 00:03:39,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:39,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454648560] [2021-06-06 00:03:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:40,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454648560] [2021-06-06 00:03:40,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454648560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637522055] [2021-06-06 00:03:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:40,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-06 00:03:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:40,457 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:03:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-06 00:03:40,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:40,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-06 00:03:40,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:40,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:40,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:03:40,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:40,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:03:40,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-06 00:03:40,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:03:40,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:03:40,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:03:40,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-06-06 00:03:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:40,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637522055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:40,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:40,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:03:40,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225302637] [2021-06-06 00:03:40,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:40,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:40,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:40,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:40,752 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:41,128 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-06-06 00:03:41,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:03:41,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:03:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:41,131 INFO L225 Difference]: With dead ends: 409 [2021-06-06 00:03:41,131 INFO L226 Difference]: Without dead ends: 394 [2021-06-06 00:03:41,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:03:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-06 00:03:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-06-06 00:03:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-06 00:03:41,140 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-06 00:03:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:41,140 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-06 00:03:41,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-06 00:03:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:41,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:41,141 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:41,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:41,358 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:41,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-06 00:03:41,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:41,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684743679] [2021-06-06 00:03:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:41,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:41,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684743679] [2021-06-06 00:03:41,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684743679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:41,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379320402] [2021-06-06 00:03:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:41,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:03:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:41,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379320402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:41,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:41,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:03:41,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388049510] [2021-06-06 00:03:41,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:03:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:03:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:41,531 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:41,929 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-06 00:03:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:03:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:41,933 INFO L225 Difference]: With dead ends: 619 [2021-06-06 00:03:41,933 INFO L226 Difference]: Without dead ends: 619 [2021-06-06 00:03:41,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:03:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-06 00:03:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-06 00:03:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-06 00:03:41,943 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-06 00:03:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:41,944 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-06 00:03:41,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-06 00:03:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:41,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:41,946 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:42,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-06 00:03:42,165 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-06 00:03:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:42,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926822948] [2021-06-06 00:03:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:42,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:42,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926822948] [2021-06-06 00:03:42,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926822948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:42,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868241996] [2021-06-06 00:03:42,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:42,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:03:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:42,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868241996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:42,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:42,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:42,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247119209] [2021-06-06 00:03:42,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:42,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:42,334 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:43,136 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-06 00:03:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:03:43,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:43,141 INFO L225 Difference]: With dead ends: 1078 [2021-06-06 00:03:43,141 INFO L226 Difference]: Without dead ends: 1078 [2021-06-06 00:03:43,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:03:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-06 00:03:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-06 00:03:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-06 00:03:43,155 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-06 00:03:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:43,155 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-06 00:03:43,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-06 00:03:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:43,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:43,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:43,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:43,379 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-06 00:03:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:43,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416181398] [2021-06-06 00:03:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:43,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:43,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416181398] [2021-06-06 00:03:43,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416181398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:43,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739282956] [2021-06-06 00:03:43,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:43,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:43,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739282956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:43,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:43,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868706654] [2021-06-06 00:03:43,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:43,574 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:44,236 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-06 00:03:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:03:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:44,241 INFO L225 Difference]: With dead ends: 951 [2021-06-06 00:03:44,241 INFO L226 Difference]: Without dead ends: 951 [2021-06-06 00:03:44,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:03:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-06 00:03:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-06 00:03:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-06 00:03:44,253 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-06 00:03:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:44,253 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-06 00:03:44,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-06 00:03:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:44,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:44,255 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:44,472 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-06 00:03:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124745017] [2021-06-06 00:03:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:44,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:44,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124745017] [2021-06-06 00:03:44,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124745017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:44,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511258363] [2021-06-06 00:03:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:03:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:44,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511258363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:44,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:44,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:03:44,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715479301] [2021-06-06 00:03:44,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:03:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:03:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:03:44,602 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:44,710 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-06 00:03:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:03:44,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:44,713 INFO L225 Difference]: With dead ends: 669 [2021-06-06 00:03:44,713 INFO L226 Difference]: Without dead ends: 663 [2021-06-06 00:03:44,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-06 00:03:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-06 00:03:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-06 00:03:44,726 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-06 00:03:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:44,726 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-06 00:03:44,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-06 00:03:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:44,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:44,728 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:44,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-06 00:03:44,941 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-06 00:03:44,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:44,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770296255] [2021-06-06 00:03:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:44,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:44,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770296255] [2021-06-06 00:03:44,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770296255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:44,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369425363] [2021-06-06 00:03:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:45,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:45,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369425363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:45,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:45,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:03:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367553625] [2021-06-06 00:03:45,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:45,130 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:45,330 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-06 00:03:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:03:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:45,334 INFO L225 Difference]: With dead ends: 710 [2021-06-06 00:03:45,334 INFO L226 Difference]: Without dead ends: 672 [2021-06-06 00:03:45,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:03:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-06 00:03:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-06 00:03:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-06 00:03:45,348 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-06 00:03:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:45,349 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-06 00:03:45,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-06 00:03:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:45,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:45,350 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:45,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:45,567 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:45,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-06 00:03:45,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:45,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139577186] [2021-06-06 00:03:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:45,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139577186] [2021-06-06 00:03:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139577186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894778492] [2021-06-06 00:03:45,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:45,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:45,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:03:45,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:45,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894778492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:45,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:45,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:03:45,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849841209] [2021-06-06 00:03:45,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:03:45,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:03:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:03:45,724 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:45,833 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-06 00:03:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:03:45,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:45,839 INFO L225 Difference]: With dead ends: 830 [2021-06-06 00:03:45,839 INFO L226 Difference]: Without dead ends: 830 [2021-06-06 00:03:45,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-06 00:03:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-06 00:03:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-06 00:03:45,857 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-06 00:03:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:45,857 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-06 00:03:45,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-06 00:03:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:45,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:45,859 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:46,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-06 00:03:46,073 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-06 00:03:46,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:46,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292170326] [2021-06-06 00:03:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:46,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:46,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292170326] [2021-06-06 00:03:46,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292170326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:46,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473762588] [2021-06-06 00:03:46,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:46,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:03:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:46,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473762588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:46,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:46,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:03:46,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910146975] [2021-06-06 00:03:46,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:03:46,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:46,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:03:46,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:03:46,211 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:46,485 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-06 00:03:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:03:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:46,490 INFO L225 Difference]: With dead ends: 1196 [2021-06-06 00:03:46,491 INFO L226 Difference]: Without dead ends: 1196 [2021-06-06 00:03:46,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:03:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-06 00:03:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-06 00:03:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-06 00:03:46,511 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-06 00:03:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:46,511 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-06 00:03:46,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-06 00:03:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:46,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:46,513 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-06 00:03:46,734 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-06 00:03:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754578233] [2021-06-06 00:03:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:46,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:46,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754578233] [2021-06-06 00:03:46,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754578233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:46,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012258439] [2021-06-06 00:03:46,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:46,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:46,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012258439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:46,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:46,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:03:46,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214722172] [2021-06-06 00:03:46,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:03:46,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:46,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:03:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:03:46,869 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:47,277 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-06 00:03:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:03:47,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:47,284 INFO L225 Difference]: With dead ends: 1492 [2021-06-06 00:03:47,284 INFO L226 Difference]: Without dead ends: 1492 [2021-06-06 00:03:47,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:03:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-06 00:03:47,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-06 00:03:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-06 00:03:47,332 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-06 00:03:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:47,332 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-06 00:03:47,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-06 00:03:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:47,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:47,334 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:47,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-06 00:03:47,549 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-06 00:03:47,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:47,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814813960] [2021-06-06 00:03:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:47,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814813960] [2021-06-06 00:03:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814813960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217986371] [2021-06-06 00:03:47,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:47,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:47,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217986371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:47,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:47,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:03:47,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976517008] [2021-06-06 00:03:47,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:47,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:47,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:47,714 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:48,000 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-06 00:03:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:03:48,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:48,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:48,006 INFO L225 Difference]: With dead ends: 1258 [2021-06-06 00:03:48,006 INFO L226 Difference]: Without dead ends: 1248 [2021-06-06 00:03:48,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:03:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-06 00:03:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-06 00:03:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-06 00:03:48,026 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-06 00:03:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:48,027 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-06 00:03:48,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-06 00:03:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:48,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:48,029 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:48,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-06 00:03:48,252 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-06 00:03:48,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:48,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952249556] [2021-06-06 00:03:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:48,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952249556] [2021-06-06 00:03:48,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952249556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147713980] [2021-06-06 00:03:48,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:48,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:03:48,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:48,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147713980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:48,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:48,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:03:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022249276] [2021-06-06 00:03:48,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:48,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:48,467 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:48,725 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-06 00:03:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:03:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:48,730 INFO L225 Difference]: With dead ends: 1329 [2021-06-06 00:03:48,730 INFO L226 Difference]: Without dead ends: 1329 [2021-06-06 00:03:48,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:03:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-06 00:03:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-06 00:03:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-06 00:03:48,748 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-06 00:03:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:48,749 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-06 00:03:48,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-06 00:03:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:48,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:48,751 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:48,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:48,974 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-06 00:03:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:48,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201681948] [2021-06-06 00:03:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:49,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:49,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201681948] [2021-06-06 00:03:49,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201681948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:49,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478667520] [2021-06-06 00:03:49,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:49,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478667520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:49,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:49,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:03:49,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508225061] [2021-06-06 00:03:49,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:03:49,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:03:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:03:49,151 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:49,505 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-06 00:03:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:03:49,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:49,512 INFO L225 Difference]: With dead ends: 1548 [2021-06-06 00:03:49,512 INFO L226 Difference]: Without dead ends: 1544 [2021-06-06 00:03:49,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:03:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-06 00:03:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-06 00:03:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-06 00:03:49,536 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-06 00:03:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:49,536 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-06 00:03:49,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-06 00:03:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:49,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:49,538 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:49,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:49,761 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-06 00:03:49,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:49,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668417345] [2021-06-06 00:03:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:49,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:49,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668417345] [2021-06-06 00:03:49,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668417345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:49,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771636964] [2021-06-06 00:03:49,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:49,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:49,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:49,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771636964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:49,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:49,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:49,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105755203] [2021-06-06 00:03:49,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:49,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:49,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:49,922 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:50,641 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-06 00:03:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:03:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:50,652 INFO L225 Difference]: With dead ends: 2734 [2021-06-06 00:03:50,652 INFO L226 Difference]: Without dead ends: 2734 [2021-06-06 00:03:50,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:03:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-06 00:03:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-06 00:03:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-06 00:03:50,686 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-06 00:03:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:50,686 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-06 00:03:50,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-06 00:03:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:50,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:50,689 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:50,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:50,913 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-06 00:03:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:50,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713470952] [2021-06-06 00:03:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:50,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713470952] [2021-06-06 00:03:50,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713470952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920299755] [2021-06-06 00:03:50,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:50,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:03:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:51,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920299755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:51,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:51,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:51,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540184087] [2021-06-06 00:03:51,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:51,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:51,108 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:51,850 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-06 00:03:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:03:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:51,858 INFO L225 Difference]: With dead ends: 2693 [2021-06-06 00:03:51,858 INFO L226 Difference]: Without dead ends: 2693 [2021-06-06 00:03:51,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:03:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-06 00:03:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-06 00:03:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-06 00:03:51,890 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-06 00:03:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:51,891 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-06 00:03:51,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-06 00:03:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:51,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:51,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:52,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-06 00:03:52,109 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-06 00:03:52,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:52,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067355274] [2021-06-06 00:03:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:52,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:52,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067355274] [2021-06-06 00:03:52,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067355274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:52,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2322347] [2021-06-06 00:03:52,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:52,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:52,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2322347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:52,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:52,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:03:52,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465468627] [2021-06-06 00:03:52,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:03:52,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:52,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:03:52,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:52,260 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:52,879 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-06 00:03:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:03:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:52,885 INFO L225 Difference]: With dead ends: 2677 [2021-06-06 00:03:52,885 INFO L226 Difference]: Without dead ends: 2677 [2021-06-06 00:03:52,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:03:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-06 00:03:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-06 00:03:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-06 00:03:52,914 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-06 00:03:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:52,914 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-06 00:03:52,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-06 00:03:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:52,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:52,916 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:53,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-06 00:03:53,129 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-06 00:03:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:53,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979372675] [2021-06-06 00:03:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:53,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:53,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979372675] [2021-06-06 00:03:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979372675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001341609] [2021-06-06 00:03:53,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:53,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:03:53,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:53,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001341609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:53,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:53,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:03:53,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66052259] [2021-06-06 00:03:53,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:03:53,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:53,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:03:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:53,279 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:53,921 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-06 00:03:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:03:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:53,928 INFO L225 Difference]: With dead ends: 2474 [2021-06-06 00:03:53,929 INFO L226 Difference]: Without dead ends: 2470 [2021-06-06 00:03:53,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:03:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-06 00:03:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-06 00:03:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-06 00:03:53,959 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-06 00:03:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:53,959 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-06 00:03:53,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-06 00:03:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:53,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:53,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:54,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-06 00:03:54,183 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-06 00:03:54,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:54,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264337645] [2021-06-06 00:03:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:54,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264337645] [2021-06-06 00:03:54,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264337645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952110784] [2021-06-06 00:03:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:54,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:03:54,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:54,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:54,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952110784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:54,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:54,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:54,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042834119] [2021-06-06 00:03:54,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:54,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:54,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:54,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:54,331 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:54,980 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-06 00:03:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:03:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:54,987 INFO L225 Difference]: With dead ends: 2514 [2021-06-06 00:03:54,987 INFO L226 Difference]: Without dead ends: 2514 [2021-06-06 00:03:54,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:03:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-06 00:03:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-06 00:03:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-06 00:03:55,017 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-06 00:03:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:55,017 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-06 00:03:55,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-06 00:03:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:55,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:55,019 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:55,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-06 00:03:55,233 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-06 00:03:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:55,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452813531] [2021-06-06 00:03:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:55,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:55,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452813531] [2021-06-06 00:03:55,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452813531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:55,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054822110] [2021-06-06 00:03:55,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:55,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:55,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054822110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:55,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:55,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:55,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189306432] [2021-06-06 00:03:55,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:55,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:55,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:55,386 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:55,979 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-06 00:03:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:03:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:55,985 INFO L225 Difference]: With dead ends: 2332 [2021-06-06 00:03:55,986 INFO L226 Difference]: Without dead ends: 2328 [2021-06-06 00:03:55,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:03:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-06 00:03:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-06 00:03:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-06 00:03:56,016 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-06 00:03:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:56,016 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-06 00:03:56,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-06 00:03:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:56,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:56,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:56,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-06 00:03:56,233 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-06 00:03:56,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:56,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096432606] [2021-06-06 00:03:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:56,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:56,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096432606] [2021-06-06 00:03:56,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096432606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138403620] [2021-06-06 00:03:56,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:56,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:03:56,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:03:56,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:56,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138403620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:56,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:56,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:03:56,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136405454] [2021-06-06 00:03:56,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:03:56,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:56,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:03:56,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:03:56,349 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:56,441 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-06 00:03:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:03:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:56,443 INFO L225 Difference]: With dead ends: 929 [2021-06-06 00:03:56,444 INFO L226 Difference]: Without dead ends: 929 [2021-06-06 00:03:56,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-06 00:03:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-06 00:03:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-06 00:03:56,477 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-06 00:03:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:56,477 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-06 00:03:56,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-06 00:03:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:56,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:56,479 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:56,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:56,693 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-06 00:03:56,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:56,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125346104] [2021-06-06 00:03:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:56,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125346104] [2021-06-06 00:03:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125346104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703235136] [2021-06-06 00:03:56,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:56,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:56,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:56,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703235136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:56,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:56,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:03:56,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65364491] [2021-06-06 00:03:56,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:03:56,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:03:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:03:56,830 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:57,097 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-06 00:03:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:03:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:57,101 INFO L225 Difference]: With dead ends: 1555 [2021-06-06 00:03:57,101 INFO L226 Difference]: Without dead ends: 1555 [2021-06-06 00:03:57,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:03:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-06 00:03:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-06 00:03:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-06 00:03:57,121 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-06 00:03:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:57,122 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-06 00:03:57,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-06 00:03:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:57,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:57,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:57,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:57,337 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:57,337 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-06 00:03:57,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:57,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690677429] [2021-06-06 00:03:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:57,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:57,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690677429] [2021-06-06 00:03:57,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690677429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:57,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493307304] [2021-06-06 00:03:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:57,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:03:57,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:57,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:57,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493307304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:57,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:57,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:03:57,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844491689] [2021-06-06 00:03:57,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:03:57,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:03:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:03:57,453 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:57,679 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-06 00:03:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:03:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:57,682 INFO L225 Difference]: With dead ends: 1605 [2021-06-06 00:03:57,682 INFO L226 Difference]: Without dead ends: 1605 [2021-06-06 00:03:57,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:03:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-06 00:03:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-06 00:03:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-06 00:03:57,699 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-06 00:03:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:57,699 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-06 00:03:57,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-06 00:03:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:57,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:57,702 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:57,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:57,925 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-06 00:03:57,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:57,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667322552] [2021-06-06 00:03:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:57,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:57,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667322552] [2021-06-06 00:03:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667322552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:57,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799987661] [2021-06-06 00:03:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:57,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:57,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:57,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799987661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:58,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:58,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:03:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024306502] [2021-06-06 00:03:58,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:03:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:03:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:03:58,037 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:58,276 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-06 00:03:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:03:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:58,279 INFO L225 Difference]: With dead ends: 1524 [2021-06-06 00:03:58,279 INFO L226 Difference]: Without dead ends: 1520 [2021-06-06 00:03:58,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:03:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-06 00:03:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-06 00:03:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-06 00:03:58,298 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-06 00:03:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:58,298 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-06 00:03:58,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-06 00:03:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:58,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:58,300 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:58,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-06 00:03:58,513 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-06 00:03:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260761185] [2021-06-06 00:03:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:58,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:58,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260761185] [2021-06-06 00:03:58,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260761185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:58,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524903194] [2021-06-06 00:03:58,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:58,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:03:58,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:58,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524903194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:58,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:58,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:03:58,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145312750] [2021-06-06 00:03:58,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:03:58,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:03:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:03:58,615 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:58,836 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-06 00:03:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:03:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:58,838 INFO L225 Difference]: With dead ends: 1508 [2021-06-06 00:03:58,838 INFO L226 Difference]: Without dead ends: 1496 [2021-06-06 00:03:58,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:03:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-06 00:03:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-06 00:03:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-06 00:03:58,853 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-06 00:03:58,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:58,853 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-06 00:03:58,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-06 00:03:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:58,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:58,855 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:59,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:59,069 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-06 00:03:59,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:59,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538392991] [2021-06-06 00:03:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:59,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538392991] [2021-06-06 00:03:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538392991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495918233] [2021-06-06 00:03:59,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:59,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:03:59,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495918233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:03:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941079579] [2021-06-06 00:03:59,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:59,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:59,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:59,212 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:59,672 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-06 00:03:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:03:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:03:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:59,675 INFO L225 Difference]: With dead ends: 2412 [2021-06-06 00:03:59,675 INFO L226 Difference]: Without dead ends: 2412 [2021-06-06 00:03:59,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:03:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-06 00:03:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-06 00:03:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-06 00:03:59,696 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-06 00:03:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:59,696 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-06 00:03:59,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-06 00:03:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:03:59,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:59,698 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:59,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-06 00:03:59,913 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-06 00:03:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:59,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604620590] [2021-06-06 00:03:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:59,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604620590] [2021-06-06 00:03:59,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604620590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952661573] [2021-06-06 00:03:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:00,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952661573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:00,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:00,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:04:00,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264466791] [2021-06-06 00:04:00,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:04:00,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:04:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:04:00,067 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:00,531 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-06 00:04:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:04:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:00,534 INFO L225 Difference]: With dead ends: 2335 [2021-06-06 00:04:00,534 INFO L226 Difference]: Without dead ends: 2335 [2021-06-06 00:04:00,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:04:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-06 00:04:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-06 00:04:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:04:00,554 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:04:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:00,554 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:04:00,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:04:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:00,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:00,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:00,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:00,778 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-06 00:04:00,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:00,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122577089] [2021-06-06 00:04:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:00,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122577089] [2021-06-06 00:04:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122577089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875480921] [2021-06-06 00:04:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:00,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:04:00,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:00,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875480921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:00,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:00,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:04:00,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652398368] [2021-06-06 00:04:00,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:04:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:04:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:04:00,931 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:01,324 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-06 00:04:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:04:01,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:01,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:01,328 INFO L225 Difference]: With dead ends: 2285 [2021-06-06 00:04:01,328 INFO L226 Difference]: Without dead ends: 2285 [2021-06-06 00:04:01,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:04:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-06 00:04:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-06 00:04:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:04:01,346 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:04:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:01,346 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:04:01,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:04:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:01,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:01,347 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:01,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-06 00:04:01,548 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:01,548 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-06 00:04:01,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:01,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921250531] [2021-06-06 00:04:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:01,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:01,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921250531] [2021-06-06 00:04:01,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921250531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:01,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783364000] [2021-06-06 00:04:01,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:01,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:04:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:01,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783364000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:01,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:01,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:04:01,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51565318] [2021-06-06 00:04:01,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:04:01,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:04:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:04:01,685 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:02,025 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-06 00:04:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:04:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:02,037 INFO L225 Difference]: With dead ends: 2176 [2021-06-06 00:04:02,037 INFO L226 Difference]: Without dead ends: 2172 [2021-06-06 00:04:02,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:04:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-06 00:04:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-06 00:04:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:04:02,056 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:04:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:02,056 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:04:02,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:04:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:02,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:02,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:02,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:02,258 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-06 00:04:02,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:02,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318785914] [2021-06-06 00:04:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:02,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:02,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318785914] [2021-06-06 00:04:02,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318785914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:02,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857270173] [2021-06-06 00:04:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:02,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:04:02,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:02,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:02,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:02,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857270173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:02,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:02,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:04:02,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690670846] [2021-06-06 00:04:02,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:04:02,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:02,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:04:02,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:04:02,402 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:02,778 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-06 00:04:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:04:02,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:02,781 INFO L225 Difference]: With dead ends: 2199 [2021-06-06 00:04:02,781 INFO L226 Difference]: Without dead ends: 2199 [2021-06-06 00:04:02,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:04:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-06 00:04:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-06 00:04:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:04:02,804 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:04:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:02,804 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:04:02,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:04:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:02,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:02,806 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:03,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:04:03,019 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-06 00:04:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:03,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402263899] [2021-06-06 00:04:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:03,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:03,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402263899] [2021-06-06 00:04:03,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402263899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:03,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495865053] [2021-06-06 00:04:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:03,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:04:03,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:03,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:03,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495865053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:03,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:03,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:04:03,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209274806] [2021-06-06 00:04:03,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:04:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:04:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:04:03,148 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:03,525 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-06 00:04:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:04:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:03,528 INFO L225 Difference]: With dead ends: 2156 [2021-06-06 00:04:03,528 INFO L226 Difference]: Without dead ends: 2152 [2021-06-06 00:04:03,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:04:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-06 00:04:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-06 00:04:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:04:03,548 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:04:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:03,548 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:04:03,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:04:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:03,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:03,550 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:03,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-06 00:04:03,771 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-06 00:04:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:03,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716641092] [2021-06-06 00:04:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:03,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716641092] [2021-06-06 00:04:03,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716641092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395687188] [2021-06-06 00:04:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:03,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:04:03,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:03,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395687188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:03,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:03,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:04:03,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046229769] [2021-06-06 00:04:03,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:04:03,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:03,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:04:03,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:04:03,907 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:04,275 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-06 00:04:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:04:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:04,278 INFO L225 Difference]: With dead ends: 2097 [2021-06-06 00:04:04,278 INFO L226 Difference]: Without dead ends: 2097 [2021-06-06 00:04:04,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:04:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-06 00:04:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-06 00:04:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-06 00:04:04,295 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-06 00:04:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:04,295 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-06 00:04:04,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-06 00:04:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:04,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:04,297 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:04,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:04,498 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-06 00:04:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:04,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71260388] [2021-06-06 00:04:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:04,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:04,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71260388] [2021-06-06 00:04:04,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71260388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:04,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904461953] [2021-06-06 00:04:04,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904461953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:04,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:04,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:04:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781797378] [2021-06-06 00:04:04,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:04:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:04:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:04:04,632 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:04,887 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-06 00:04:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:04:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:04,889 INFO L225 Difference]: With dead ends: 1963 [2021-06-06 00:04:04,889 INFO L226 Difference]: Without dead ends: 1959 [2021-06-06 00:04:04,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:04:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-06 00:04:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-06 00:04:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-06 00:04:04,911 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-06 00:04:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:04,911 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-06 00:04:04,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-06 00:04:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:04,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:04,913 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:05,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-06 00:04:05,129 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-06 00:04:05,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:05,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331156903] [2021-06-06 00:04:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331156903] [2021-06-06 00:04:05,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331156903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033493789] [2021-06-06 00:04:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:05,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:04:05,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:05,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033493789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:05,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:05,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:04:05,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481017001] [2021-06-06 00:04:05,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:04:05,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:05,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:04:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:04:05,240 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:05,458 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-06 00:04:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:04:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:05,462 INFO L225 Difference]: With dead ends: 1728 [2021-06-06 00:04:05,462 INFO L226 Difference]: Without dead ends: 1716 [2021-06-06 00:04:05,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:04:05,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-06 00:04:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-06 00:04:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-06 00:04:05,483 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-06 00:04:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:05,483 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-06 00:04:05,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-06 00:04:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:05,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:05,485 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:05,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:05,705 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-06 00:04:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:05,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141297881] [2021-06-06 00:04:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:05,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:05,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141297881] [2021-06-06 00:04:05,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141297881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:05,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507831025] [2021-06-06 00:04:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:05,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:04:05,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:05,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507831025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:05,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:05,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:04:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963992687] [2021-06-06 00:04:05,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:04:05,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:05,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:04:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:04:05,874 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:06,189 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-06 00:04:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:04:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:06,191 INFO L225 Difference]: With dead ends: 1821 [2021-06-06 00:04:06,191 INFO L226 Difference]: Without dead ends: 1821 [2021-06-06 00:04:06,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:04:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-06 00:04:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-06 00:04:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-06 00:04:06,210 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-06 00:04:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:06,210 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-06 00:04:06,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-06 00:04:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:06,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:06,212 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:06,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-06 00:04:06,413 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-06 00:04:06,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:06,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958180141] [2021-06-06 00:04:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:06,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958180141] [2021-06-06 00:04:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958180141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676612325] [2021-06-06 00:04:06,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:06,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:04:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:06,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676612325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:06,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:06,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:04:06,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870090603] [2021-06-06 00:04:06,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:04:06,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:06,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:04:06,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:04:06,558 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:06,832 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-06 00:04:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:04:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:06,835 INFO L225 Difference]: With dead ends: 1790 [2021-06-06 00:04:06,835 INFO L226 Difference]: Without dead ends: 1786 [2021-06-06 00:04:06,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:04:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-06 00:04:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-06 00:04:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-06 00:04:06,852 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-06 00:04:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:06,853 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-06 00:04:06,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-06 00:04:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:04:06,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:06,855 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:07,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-06 00:04:07,077 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:07,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:07,077 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-06 00:04:07,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:07,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99075477] [2021-06-06 00:04:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:07,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99075477] [2021-06-06 00:04:07,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99075477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:07,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154985192] [2021-06-06 00:04:07,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:07,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:04:07,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:04:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:07,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154985192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:07,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:07,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:04:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086480359] [2021-06-06 00:04:07,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:04:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:04:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:04:07,219 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:07,368 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-06 00:04:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:04:07,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:04:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:07,371 INFO L225 Difference]: With dead ends: 1649 [2021-06-06 00:04:07,371 INFO L226 Difference]: Without dead ends: 1637 [2021-06-06 00:04:07,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:04:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-06 00:04:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-06 00:04:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-06 00:04:07,394 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-06 00:04:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:07,394 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-06 00:04:07,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-06 00:04:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:07,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:07,395 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:07,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:07,596 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-06 00:04:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315332805] [2021-06-06 00:04:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:07,830 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-06 00:04:07,960 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-06 00:04:08,078 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-06 00:04:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:08,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:08,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315332805] [2021-06-06 00:04:08,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315332805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:08,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394678913] [2021-06-06 00:04:08,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:08,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:04:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:08,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:04:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:04:08,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:08,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:04:08,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:08,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:08,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:08,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:08,811 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:08,820 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:08,827 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:04:08,832 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:08,838 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:08,844 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:04:08,850 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:08,856 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:08,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:08,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:04:08,860 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:08,932 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:04:08,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:04:08,935 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:04:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:08,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394678913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:08,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:08,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:04:08,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753264090] [2021-06-06 00:04:08,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:04:08,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:08,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:04:08,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:04:08,986 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:09,859 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-06-06 00:04:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:04:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:09,861 INFO L225 Difference]: With dead ends: 1531 [2021-06-06 00:04:09,861 INFO L226 Difference]: Without dead ends: 1516 [2021-06-06 00:04:09,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1334.6ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:04:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-06 00:04:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-06-06 00:04:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-06 00:04:09,879 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-06 00:04:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:09,880 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-06 00:04:09,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-06 00:04:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:09,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:09,883 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:10,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-06 00:04:10,104 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-06 00:04:10,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:10,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753336161] [2021-06-06 00:04:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:10,414 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-06 00:04:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:10,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:10,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753336161] [2021-06-06 00:04:10,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753336161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:10,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387541009] [2021-06-06 00:04:10,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:10,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:04:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:04:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:11,283 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-06 00:04:11,346 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-06 00:04:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:11,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:11,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:11,483 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-06 00:04:11,483 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-06 00:04:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:11,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:11,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:11,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:11,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:11,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:11,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:11,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:11,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:11,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:11,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:04:11,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-06 00:04:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:11,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387541009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:11,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:11,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:04:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022725407] [2021-06-06 00:04:11,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:04:11,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:04:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:04:11,668 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:12,572 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-06-06 00:04:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:04:12,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:12,574 INFO L225 Difference]: With dead ends: 1509 [2021-06-06 00:04:12,574 INFO L226 Difference]: Without dead ends: 1494 [2021-06-06 00:04:12,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1457.7ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:04:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-06-06 00:04:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-06-06 00:04:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-06 00:04:12,588 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-06 00:04:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:12,588 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-06 00:04:12,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-06 00:04:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:12,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:12,590 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:12,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:12,791 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-06 00:04:12,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:12,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172343632] [2021-06-06 00:04:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:13,272 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-06 00:04:13,450 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-06 00:04:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:13,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172343632] [2021-06-06 00:04:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172343632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682334169] [2021-06-06 00:04:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:13,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:04:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:04:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:14,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:14,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:04:14,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:14,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:14,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:04:14,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:04:14,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:04:14,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:04:14,371 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:04:14,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:04:14,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:04:14,400 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:04:14,414 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:04:14,424 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:14,434 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:14,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:04:14,440 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:14,469 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:04:14,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:04:14,471 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:04:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:14,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682334169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:14,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:14,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:04:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747309957] [2021-06-06 00:04:14,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:04:14,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:04:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:04:14,510 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:15,639 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2021-06-06 00:04:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:16,223 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-06-06 00:04:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:04:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:16,225 INFO L225 Difference]: With dead ends: 1607 [2021-06-06 00:04:16,225 INFO L226 Difference]: Without dead ends: 1592 [2021-06-06 00:04:16,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2148.1ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:04:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-06 00:04:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-06-06 00:04:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-06 00:04:16,240 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-06 00:04:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:16,240 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-06 00:04:16,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-06 00:04:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:16,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:16,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:16,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-06 00:04:16,443 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:16,443 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-06 00:04:16,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:16,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259938776] [2021-06-06 00:04:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:16,958 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-06 00:04:17,202 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-06 00:04:17,341 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-06-06 00:04:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:17,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:17,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259938776] [2021-06-06 00:04:17,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259938776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:17,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211091802] [2021-06-06 00:04:17,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:17,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:04:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:04:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:17,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:17,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-06 00:04:17,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:04:17,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-06 00:04:17,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:04:17,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-06 00:04:17,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:04:17,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-06 00:04:17,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:04:17,880 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-06 00:04:17,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,909 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-06-06 00:04:17,910 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-06 00:04:17,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-06 00:04:17,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:17,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:04:17,951 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:04:17,970 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:17,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-06 00:04:17,990 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:17,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:18,006 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:04:18,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-06-06 00:04:18,008 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:18,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:18,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-06 00:04:18,025 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:18,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:04:18,035 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:18,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:18,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:04:18,135 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-06-06 00:04:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:18,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211091802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:18,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:18,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:04:18,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384921749] [2021-06-06 00:04:18,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:04:18,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:18,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:04:18,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:04:18,376 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:19,125 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-06 00:04:19,264 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-06 00:04:19,406 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-06 00:04:19,805 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-06 00:04:19,959 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-06 00:04:20,228 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-06 00:04:20,381 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-06 00:04:20,630 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-06 00:04:20,795 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-06 00:04:21,343 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-06 00:04:21,594 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-06 00:04:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:21,693 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-06-06 00:04:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:04:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:21,696 INFO L225 Difference]: With dead ends: 1843 [2021-06-06 00:04:21,696 INFO L226 Difference]: Without dead ends: 1828 [2021-06-06 00:04:21,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3895.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:04:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-06 00:04:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-06-06 00:04:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-06 00:04:21,714 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-06 00:04:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:21,714 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-06 00:04:21,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-06 00:04:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:21,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:21,716 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:21,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:21,916 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-06 00:04:21,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:21,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461148386] [2021-06-06 00:04:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:22,345 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-06 00:04:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:22,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461148386] [2021-06-06 00:04:22,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461148386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226226539] [2021-06-06 00:04:22,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:04:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:04:23,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:23,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:04:23,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:04:23,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:04:23,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:04:23,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:04:23,263 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:23,275 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:04:23,288 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:04:23,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:23,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:04:23,318 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:04:23,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:04:23,341 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:23,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:23,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:23,348 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:23,376 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:04:23,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:04:23,378 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:04:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226226539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:23,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:23,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:04:23,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351684843] [2021-06-06 00:04:23,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:04:23,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:04:23,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:04:23,426 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:24,671 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-06 00:04:24,901 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-06 00:04:25,043 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-06 00:04:25,172 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-06 00:04:25,509 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-06 00:04:25,672 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-06-06 00:04:26,103 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-06-06 00:04:26,591 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-06 00:04:26,767 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-06 00:04:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:26,887 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-06-06 00:04:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:04:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:26,891 INFO L225 Difference]: With dead ends: 1877 [2021-06-06 00:04:26,891 INFO L226 Difference]: Without dead ends: 1862 [2021-06-06 00:04:26,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3626.7ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:04:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-06 00:04:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-06-06 00:04:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-06 00:04:26,909 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-06 00:04:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:26,909 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-06 00:04:26,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-06 00:04:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:26,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:26,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:27,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:27,112 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:27,112 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-06 00:04:27,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:27,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931058057] [2021-06-06 00:04:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:27,480 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-06 00:04:27,597 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-06 00:04:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:27,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:27,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931058057] [2021-06-06 00:04:27,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931058057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:27,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414034930] [2021-06-06 00:04:27,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:27,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:04:27,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:04:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,498 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-06 00:04:28,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:04:28,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,537 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-06 00:04:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-06-06 00:04:28,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,577 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:04:28,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-06-06 00:04:28,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,626 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-06-06 00:04:28,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-06-06 00:04:28,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,654 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:04:28,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,679 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:04:28,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,715 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-06-06 00:04:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-06-06 00:04:28,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,739 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:04:28,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,775 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:04:28,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:04:28,780 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,801 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:04:28,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,824 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:04:28,825 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,869 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:04:28,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-06-06 00:04:28,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:28,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-06 00:04:28,916 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,937 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:04:28,939 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,955 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:04:28,956 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:28,965 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:04:28,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:04:28,965 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:29,084 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-06-06 00:04:29,084 INFO L628 ElimStorePlain]: treesize reduction 94, result has 58.6 percent of original size [2021-06-06 00:04:29,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:04:29,087 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-06-06 00:04:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:29,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414034930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:29,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:29,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-06 00:04:29,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144098917] [2021-06-06 00:04:29,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:04:29,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:04:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:04:29,259 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:30,733 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-06 00:04:30,857 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-06 00:04:31,061 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-06-06 00:04:31,196 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-06-06 00:04:31,529 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-06 00:04:32,077 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-06 00:04:32,223 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-06 00:04:32,364 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-06 00:04:32,698 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-06 00:04:33,010 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-06 00:04:33,183 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-06-06 00:04:33,445 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-06 00:04:33,729 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-06 00:04:33,855 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-06-06 00:04:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:33,984 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-06-06 00:04:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:04:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:33,987 INFO L225 Difference]: With dead ends: 2051 [2021-06-06 00:04:33,987 INFO L226 Difference]: Without dead ends: 2006 [2021-06-06 00:04:33,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4973.6ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:04:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-06-06 00:04:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-06-06 00:04:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-06-06 00:04:34,004 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-06-06 00:04:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:34,004 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-06-06 00:04:34,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-06-06 00:04:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:34,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:34,006 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:34,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-06 00:04:34,207 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-06 00:04:34,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:34,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642871497] [2021-06-06 00:04:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:34,453 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-06 00:04:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:34,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:34,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642871497] [2021-06-06 00:04:34,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642871497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:34,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412472474] [2021-06-06 00:04:34,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:04:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:35,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:35,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:04:35,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:35,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:04:35,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:35,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:35,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:35,361 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:35,368 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:04:35,375 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:35,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:04:35,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:04:35,401 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:04:35,407 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:35,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:35,411 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:35,483 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:04:35,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:04:35,485 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:04:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412472474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:35,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:35,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:04:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89780189] [2021-06-06 00:04:35,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:04:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:04:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:04:35,539 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:37,483 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-06-06 00:04:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:04:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:37,486 INFO L225 Difference]: With dead ends: 1960 [2021-06-06 00:04:37,486 INFO L226 Difference]: Without dead ends: 1945 [2021-06-06 00:04:37,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2260.5ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:04:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-06 00:04:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-06-06 00:04:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-06-06 00:04:37,507 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-06-06 00:04:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:37,507 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-06-06 00:04:37,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-06-06 00:04:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:37,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:37,510 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:37,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:37,725 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-06 00:04:37,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:37,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673980411] [2021-06-06 00:04:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:37,948 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-06 00:04:38,074 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-06 00:04:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:38,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673980411] [2021-06-06 00:04:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673980411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879840529] [2021-06-06 00:04:38,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:38,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:04:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:04:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:38,768 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-06 00:04:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:38,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:38,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-06-06 00:04:38,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,011 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-06 00:04:39,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,035 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:04:39,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-06 00:04:39,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,178 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-06 00:04:39,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,201 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:04:39,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-06 00:04:39,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,342 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-06 00:04:39,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,368 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:04:39,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-06 00:04:39,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,507 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:04:39,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-06 00:04:39,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,674 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-06 00:04:39,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-06-06 00:04:39,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,821 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:04:39,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,840 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:04:39,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-06 00:04:39,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:39,966 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:04:39,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:39,986 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:04:39,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-06 00:04:39,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:40,122 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:04:40,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:40,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:04:40,141 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-06-06 00:04:40,408 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-06 00:04:40,620 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-06 00:04:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:40,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879840529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:40,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:40,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:04:40,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674347820] [2021-06-06 00:04:40,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:04:40,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:40,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:04:40,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:04:40,749 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:41,830 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-06-06 00:04:42,208 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-06-06 00:04:42,596 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-06 00:04:42,917 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-06-06 00:04:43,276 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:04:43,756 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-06 00:04:44,176 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-06 00:04:44,323 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-06 00:04:44,664 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-06-06 00:04:45,003 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-06 00:04:45,473 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-06-06 00:04:45,804 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-06-06 00:04:46,371 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-06-06 00:04:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:46,442 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-06-06 00:04:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:04:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:46,445 INFO L225 Difference]: With dead ends: 2026 [2021-06-06 00:04:46,445 INFO L226 Difference]: Without dead ends: 2011 [2021-06-06 00:04:46,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 6231.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:04:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-06 00:04:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-06-06 00:04:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-06-06 00:04:46,466 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-06-06 00:04:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:46,467 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-06-06 00:04:46,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-06-06 00:04:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:46,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:46,469 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:46,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-06 00:04:46,685 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-06-06 00:04:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:46,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294784645] [2021-06-06 00:04:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:47,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:47,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294784645] [2021-06-06 00:04:47,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294784645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:47,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555414788] [2021-06-06 00:04:47,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:47,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:04:47,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:04:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:47,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:47,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:47,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:47,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:47,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:47,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:04:47,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:47,971 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-06 00:04:47,972 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-06-06 00:04:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:47,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:47,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:47,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:48,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:48,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:48,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:48,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:48,114 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-06 00:04:48,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:04:48,117 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-06-06 00:04:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555414788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:48,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:48,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:04:48,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158212977] [2021-06-06 00:04:48,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:04:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:04:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:04:48,175 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:48,837 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-06 00:04:49,232 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-06 00:04:49,451 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-06-06 00:04:49,833 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-06-06 00:04:50,137 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-06 00:04:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:50,212 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-06-06 00:04:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:04:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:50,215 INFO L225 Difference]: With dead ends: 2027 [2021-06-06 00:04:50,215 INFO L226 Difference]: Without dead ends: 2012 [2021-06-06 00:04:50,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2389.0ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:04:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-06 00:04:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-06-06 00:04:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-06-06 00:04:50,232 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-06-06 00:04:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:50,232 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-06-06 00:04:50,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-06-06 00:04:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:50,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:50,234 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:50,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:50,435 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-06-06 00:04:50,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:50,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710812715] [2021-06-06 00:04:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:50,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:50,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710812715] [2021-06-06 00:04:50,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710812715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:50,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136172004] [2021-06-06 00:04:50,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:50,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:04:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:04:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:51,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:51,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-06 00:04:51,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:04:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:04:51,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,206 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:51,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,218 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:51,218 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:51,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-06 00:04:51,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:51,247 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:51,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-06 00:04:51,264 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:51,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-06 00:04:51,299 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:04:51,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,330 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:51,331 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:04:51,343 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:04:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:04:51,359 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,370 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:04:51,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:04:51,370 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:51,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-06 00:04:51,385 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:51,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:51,394 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:04:51,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-06 00:04:51,396 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:51,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:51,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:04:51,493 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-06 00:04:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136172004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:51,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:51,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:04:51,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563262226] [2021-06-06 00:04:51,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:04:51,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:04:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:04:51,694 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:53,663 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-06 00:04:53,951 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-06-06 00:04:54,181 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-06 00:04:54,424 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-06 00:04:54,569 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:04:54,773 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-06-06 00:04:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:54,899 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-06-06 00:04:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:04:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:54,902 INFO L225 Difference]: With dead ends: 2385 [2021-06-06 00:04:54,902 INFO L226 Difference]: Without dead ends: 2355 [2021-06-06 00:04:54,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3280.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:04:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-06-06 00:04:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-06-06 00:04:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-06-06 00:04:54,923 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-06-06 00:04:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:54,924 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-06-06 00:04:54,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-06-06 00:04:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:54,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:54,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:55,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-06 00:04:55,126 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-06-06 00:04:55,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:55,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309923021] [2021-06-06 00:04:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:55,446 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-06 00:04:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:55,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:04:55,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309923021] [2021-06-06 00:04:55,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309923021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:55,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810115353] [2021-06-06 00:04:55,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:04:55,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:04:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:04:55,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:04:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:04:56,107 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-06 00:04:56,318 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-06-06 00:04:56,380 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-06-06 00:04:56,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:56,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-06 00:04:56,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:56,495 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-06 00:04:56,495 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-06-06 00:04:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:56,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:56,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:56,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:56,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:56,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:56,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:56,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:56,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:04:56,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:04:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:04:56,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:04:56,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:04:56,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:04:56,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:04:56,640 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-06-06 00:04:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:04:56,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810115353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:04:56,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:04:56,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:04:56,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159461240] [2021-06-06 00:04:56,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:04:56,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:04:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:04:56,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:04:56,699 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:57,301 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-06 00:04:57,524 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-06 00:04:57,856 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-06 00:04:58,109 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-06 00:04:58,584 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-06 00:04:58,991 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-06 00:04:59,186 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-06 00:04:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:04:59,330 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-06-06 00:04:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:04:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:04:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:04:59,333 INFO L225 Difference]: With dead ends: 1957 [2021-06-06 00:04:59,333 INFO L226 Difference]: Without dead ends: 1942 [2021-06-06 00:04:59,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3107.0ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:04:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-06-06 00:04:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-06-06 00:04:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-06-06 00:04:59,352 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-06-06 00:04:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:04:59,352 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-06-06 00:04:59,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:04:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-06-06 00:04:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:04:59,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:04:59,355 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:04:59,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-06 00:04:59,569 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:04:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:04:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-06-06 00:04:59,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:04:59,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267486472] [2021-06-06 00:04:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:04:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:04:59,949 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-06 00:05:00,122 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-06 00:05:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:00,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:00,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267486472] [2021-06-06 00:05:00,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267486472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:00,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156789592] [2021-06-06 00:05:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:00,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:05:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:05:00,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:00,556 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-06 00:05:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:00,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:00,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:05:00,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:00,769 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:05:00,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:00,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:00,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:00,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:05:00,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:00,892 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-06 00:05:00,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:00,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:00,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:05:00,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:01,016 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:05:01,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:01,028 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:01,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:05:01,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:01,132 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:05:01,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:01,145 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:01,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:05:01,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:01,247 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-06 00:05:01,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:01,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:05:01,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:01,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:01,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:05:01,369 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:01,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:01,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:05:01,488 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:01,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:01,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:01,582 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:05:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:01,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156789592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:01,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:01,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:05:01,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069321934] [2021-06-06 00:05:01,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:05:01,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:05:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:05:01,770 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:02,103 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-06 00:05:02,542 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-06-06 00:05:02,909 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-06 00:05:03,198 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:05:03,500 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-06 00:05:03,703 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-06 00:05:03,905 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-06 00:05:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:04,004 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-06-06 00:05:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:05:04,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:04,008 INFO L225 Difference]: With dead ends: 2349 [2021-06-06 00:05:04,008 INFO L226 Difference]: Without dead ends: 2319 [2021-06-06 00:05:04,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2615.2ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:05:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-06 00:05:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-06-06 00:05:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-06-06 00:05:04,027 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-06-06 00:05:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:04,028 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-06-06 00:05:04,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-06-06 00:05:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:04,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:04,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:04,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:04,230 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-06 00:05:04,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:04,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635586314] [2021-06-06 00:05:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:04,568 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-06 00:05:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:04,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:04,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635586314] [2021-06-06 00:05:04,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635586314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:04,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933442161] [2021-06-06 00:05:04,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:04,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:05:04,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:05:04,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-06-06 00:05:05,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-06-06 00:05:05,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:05:05,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-06 00:05:05,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-06-06 00:05:05,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-06 00:05:05,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-06 00:05:05,130 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-06-06 00:05:05,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-06 00:05:05,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-06-06 00:05:05,161 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-06 00:05:05,174 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-06-06 00:05:05,187 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-06 00:05:05,200 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-06-06 00:05:05,213 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-06-06 00:05:05,223 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:05,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:05,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:05:05,230 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:05,270 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-06-06 00:05:05,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:05:05,271 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-06-06 00:05:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:05,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933442161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:05,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:05,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-06 00:05:05,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770667804] [2021-06-06 00:05:05,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:05:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:05:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:05:05,351 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:05,733 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-06 00:05:05,951 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-06 00:05:06,272 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-06 00:05:06,424 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-06 00:05:06,603 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-06 00:05:07,197 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-06 00:05:07,650 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-06 00:05:07,881 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-06-06 00:05:08,461 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-06-06 00:05:09,168 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-06 00:05:09,345 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-06 00:05:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:09,658 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-06-06 00:05:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:05:09,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:09,663 INFO L225 Difference]: With dead ends: 3196 [2021-06-06 00:05:09,663 INFO L226 Difference]: Without dead ends: 3109 [2021-06-06 00:05:09,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 4154.0ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:05:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-06 00:05:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-06-06 00:05:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-06-06 00:05:09,691 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-06-06 00:05:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:09,691 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-06-06 00:05:09,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-06-06 00:05:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:09,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:09,694 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:09,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-06 00:05:09,895 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-06 00:05:09,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:09,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391373818] [2021-06-06 00:05:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:10,273 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-06 00:05:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:10,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391373818] [2021-06-06 00:05:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391373818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182379970] [2021-06-06 00:05:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:10,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:05:10,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:10,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:05:10,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:05:11,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-06 00:05:11,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:05:11,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-06-06 00:05:11,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:05:11,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-06 00:05:11,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-06 00:05:11,340 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-06 00:05:11,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:05:11,361 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-06 00:05:11,370 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-06 00:05:11,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-06 00:05:11,392 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-06 00:05:11,402 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:05:11,411 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:05:11,418 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:11,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:05:11,423 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:11,456 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-06 00:05:11,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:05:11,457 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-06-06 00:05:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:11,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182379970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:11,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:11,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:05:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922679401] [2021-06-06 00:05:11,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:05:11,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:11,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:05:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:05:11,494 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:12,020 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-06 00:05:12,350 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-06 00:05:12,499 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-06 00:05:12,962 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-06 00:05:13,436 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-06-06 00:05:13,729 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-06-06 00:05:14,228 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-06-06 00:05:14,380 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-06 00:05:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:14,620 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-06-06 00:05:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:05:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:14,624 INFO L225 Difference]: With dead ends: 2965 [2021-06-06 00:05:14,624 INFO L226 Difference]: Without dead ends: 2920 [2021-06-06 00:05:14,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3301.9ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:05:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-06-06 00:05:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-06-06 00:05:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-06-06 00:05:14,647 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-06-06 00:05:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:14,647 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-06-06 00:05:14,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-06-06 00:05:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:14,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:14,649 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:14,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-06 00:05:14,849 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-06 00:05:14,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:14,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094650650] [2021-06-06 00:05:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:15,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:15,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094650650] [2021-06-06 00:05:15,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094650650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:15,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027753145] [2021-06-06 00:05:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:15,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:05:15,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:15,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:05:15,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,928 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-06 00:05:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-06-06 00:05:15,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,957 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:05:15,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-06-06 00:05:15,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:15,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:15,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-06 00:05:16,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,027 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-06 00:05:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-06 00:05:16,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,046 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-06 00:05:16,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,073 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-06 00:05:16,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-06-06 00:05:16,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,100 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-06 00:05:16,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-06-06 00:05:16,101 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,118 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:05:16,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,135 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:05:16,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,154 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:05:16,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,171 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:05:16,172 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,195 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-06 00:05:16,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-06 00:05:16,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,213 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:05:16,214 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,230 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:05:16,230 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,247 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:05:16,248 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:16,263 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:05:16,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:05:16,264 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:16,370 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-06 00:05:16,370 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-06-06 00:05:16,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:05:16,372 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-06 00:05:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027753145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:16,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:16,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:05:16,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473196512] [2021-06-06 00:05:16,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:05:16,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:05:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:05:16,510 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:17,002 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-06 00:05:17,117 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-06 00:05:17,544 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-06 00:05:17,774 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-06 00:05:18,125 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-06 00:05:18,317 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-06 00:05:18,559 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-06 00:05:18,681 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-06 00:05:18,932 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-06 00:05:19,435 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-06 00:05:19,934 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-06-06 00:05:20,182 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-06 00:05:20,349 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-06-06 00:05:20,613 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-06 00:05:20,843 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-06-06 00:05:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:21,430 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-06-06 00:05:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:05:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:21,435 INFO L225 Difference]: With dead ends: 3428 [2021-06-06 00:05:21,435 INFO L226 Difference]: Without dead ends: 3368 [2021-06-06 00:05:21,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4671.2ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:05:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-06-06 00:05:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-06-06 00:05:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-06-06 00:05:21,460 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-06-06 00:05:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:21,460 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-06-06 00:05:21,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-06-06 00:05:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:21,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:21,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:21,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-06-06 00:05:21,665 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-06-06 00:05:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:21,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844979719] [2021-06-06 00:05:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:22,029 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-06 00:05:22,236 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-06 00:05:22,409 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-06 00:05:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:22,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:22,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844979719] [2021-06-06 00:05:22,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844979719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:22,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147889613] [2021-06-06 00:05:22,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:05:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:05:22,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:22,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:22,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:05:22,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:22,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:22,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:22,960 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:22,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:22,972 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:05:22,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:05:22,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:22,991 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:22,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:22,996 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:22,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:23,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:23,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:23,002 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:23,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:05:23,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:23,078 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:05:23,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:05:23,080 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:05:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:23,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147889613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:23,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:23,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:05:23,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538451373] [2021-06-06 00:05:23,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:05:23,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:05:23,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:05:23,131 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:24,009 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-06-06 00:05:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:05:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:24,013 INFO L225 Difference]: With dead ends: 1908 [2021-06-06 00:05:24,013 INFO L226 Difference]: Without dead ends: 1893 [2021-06-06 00:05:24,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1536.8ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:05:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-06-06 00:05:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-06-06 00:05:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-06-06 00:05:24,032 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-06-06 00:05:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:24,032 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-06-06 00:05:24,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-06-06 00:05:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:24,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:24,035 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:24,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-06 00:05:24,257 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-06-06 00:05:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:24,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762432154] [2021-06-06 00:05:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:24,482 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-06 00:05:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:24,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:24,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762432154] [2021-06-06 00:05:24,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762432154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:24,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958399970] [2021-06-06 00:05:24,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:24,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:05:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:05:24,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:25,291 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-06 00:05:25,374 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-06-06 00:05:25,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:25,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:25,603 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-06 00:05:25,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:25,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:25,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:25,807 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-06 00:05:25,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:25,830 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:05:25,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-06 00:05:25,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:25,981 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:05:25,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:26,004 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:05:26,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-06 00:05:26,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:26,156 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-06 00:05:26,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:26,176 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:05:26,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:05:26,178 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:26,314 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-06 00:05:26,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:26,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:26,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:26,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-06 00:05:26,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:26,469 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:05:26,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:26,488 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:05:26,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-06 00:05:26,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:26,622 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-06 00:05:26,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:26,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:26,643 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:05:26,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-06 00:05:26,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:26,793 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-06 00:05:26,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:26,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:26,816 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-06-06 00:05:27,124 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-06 00:05:27,336 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-06 00:05:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:27,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958399970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:27,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:27,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:05:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739534692] [2021-06-06 00:05:27,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:05:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:05:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:05:27,436 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:27,681 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 21 [2021-06-06 00:05:28,441 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-06-06 00:05:28,879 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:05:29,458 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-06-06 00:05:29,642 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:05:30,068 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-06 00:05:30,516 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-06 00:05:30,868 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-06 00:05:31,098 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-06 00:05:31,591 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-06 00:05:31,822 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-06-06 00:05:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:31,880 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-06-06 00:05:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:05:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:31,883 INFO L225 Difference]: With dead ends: 2211 [2021-06-06 00:05:31,883 INFO L226 Difference]: Without dead ends: 2181 [2021-06-06 00:05:31,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 5124.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:05:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-06-06 00:05:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-06-06 00:05:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-06-06 00:05:31,910 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-06-06 00:05:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:31,911 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-06-06 00:05:31,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-06-06 00:05:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:31,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:31,913 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:32,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:32,135 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-06-06 00:05:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:32,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757393433] [2021-06-06 00:05:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:32,396 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-06 00:05:32,664 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-06 00:05:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:32,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757393433] [2021-06-06 00:05:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757393433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:32,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247924644] [2021-06-06 00:05:32,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:32,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:05:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:05:32,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:33,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:33,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:33,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,192 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:05:33,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,210 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:05:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:05:33,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,232 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:05:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:05:33,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:05:33,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:33,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:33,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,283 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:05:33,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,293 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:33,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,317 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:33,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:05:33,321 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,330 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:33,331 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,350 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:33,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:05:33,371 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,381 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:33,382 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,390 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:33,391 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,399 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:33,400 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,412 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:33,413 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,435 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:33,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:05:33,437 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:33,556 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-06 00:05:33,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:33,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:33,587 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-06-06 00:05:33,916 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-06 00:05:34,135 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-06 00:05:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:34,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247924644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:34,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:34,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:05:34,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732965813] [2021-06-06 00:05:34,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:05:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:05:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:05:34,256 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:35,019 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-06-06 00:05:35,407 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-06 00:05:35,696 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-06 00:05:35,882 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-06 00:05:36,135 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2021-06-06 00:05:36,297 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-06 00:05:36,518 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-06 00:05:36,768 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:05:37,033 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-06 00:05:37,314 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-06 00:05:37,625 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-06 00:05:37,884 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-06-06 00:05:38,235 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-06-06 00:05:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:38,306 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-06-06 00:05:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:05:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:38,309 INFO L225 Difference]: With dead ends: 2207 [2021-06-06 00:05:38,309 INFO L226 Difference]: Without dead ends: 2192 [2021-06-06 00:05:38,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4739.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:05:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-06 00:05:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-06-06 00:05:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-06-06 00:05:38,331 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-06-06 00:05:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:38,331 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-06-06 00:05:38,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-06-06 00:05:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:38,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:38,333 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:38,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:38,535 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:38,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-06-06 00:05:38,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:38,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140989667] [2021-06-06 00:05:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:38,973 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-06-06 00:05:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:39,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140989667] [2021-06-06 00:05:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140989667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834014781] [2021-06-06 00:05:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:39,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:05:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:05:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:05:39,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:39,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:05:39,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:05:39,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:39,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:05:39,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,484 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:05:39,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,494 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:39,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,504 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:39,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,513 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:39,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:05:39,529 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,542 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:39,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:05:39,543 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,554 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:39,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:05:39,556 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,565 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:39,566 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,576 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:39,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:05:39,578 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,594 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:39,595 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,604 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:05:39,605 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:39,611 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:39,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:39,616 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:39,730 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-06 00:05:39,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:39,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:39,736 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-06-06 00:05:39,895 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-06-06 00:05:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:39,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834014781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:39,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:39,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:05:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936031295] [2021-06-06 00:05:39,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:05:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:39,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:05:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:05:39,994 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:40,786 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-06 00:05:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:40,824 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-06-06 00:05:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:05:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:40,827 INFO L225 Difference]: With dead ends: 2055 [2021-06-06 00:05:40,828 INFO L226 Difference]: Without dead ends: 2040 [2021-06-06 00:05:40,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1378.4ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:05:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-06 00:05:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-06-06 00:05:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-06-06 00:05:40,850 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-06-06 00:05:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:40,850 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-06-06 00:05:40,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-06-06 00:05:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:40,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:40,852 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:41,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:41,052 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-06-06 00:05:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:41,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060842734] [2021-06-06 00:05:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:41,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:41,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060842734] [2021-06-06 00:05:41,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060842734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:41,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080609848] [2021-06-06 00:05:41,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:41,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:05:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:05:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:41,871 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-06 00:05:42,093 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-06 00:05:42,162 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-06-06 00:05:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:05:42,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:42,272 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-06 00:05:42,272 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-06 00:05:42,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:42,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:42,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:42,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:42,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:42,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:42,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:42,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:42,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:42,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:05:42,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:42,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:42,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:05:42,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-06 00:05:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080609848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:42,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:42,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:05:42,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912693926] [2021-06-06 00:05:42,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:05:42,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:05:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:05:42,427 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:43,147 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-06 00:05:43,599 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:05:43,943 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-06 00:05:44,125 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-06 00:05:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:44,274 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-06-06 00:05:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:05:44,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:44,278 INFO L225 Difference]: With dead ends: 2067 [2021-06-06 00:05:44,278 INFO L226 Difference]: Without dead ends: 2052 [2021-06-06 00:05:44,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2282.0ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:05:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-06-06 00:05:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-06-06 00:05:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-06-06 00:05:44,304 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-06-06 00:05:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:44,305 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-06-06 00:05:44,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-06-06 00:05:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:44,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:44,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:44,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-06-06 00:05:44,521 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-06-06 00:05:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:44,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267100906] [2021-06-06 00:05:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:44,746 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-06-06 00:05:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:45,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267100906] [2021-06-06 00:05:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267100906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580470413] [2021-06-06 00:05:45,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:45,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:05:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:05:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:45,522 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-06 00:05:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:45,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:45,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:45,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:46,091 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-06-06 00:05:46,091 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-06 00:05:46,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:46,121 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:46,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:05:46,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:46,254 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-06 00:05:46,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:46,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:46,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:05:46,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:46,426 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-06 00:05:46,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:46,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:05:46,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:46,689 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-06 00:05:46,689 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-06-06 00:05:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:46,709 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:05:46,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:05:46,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:46,827 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-06 00:05:46,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:46,849 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:46,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:05:46,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:46,967 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-06 00:05:46,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:46,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:46,987 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:05:46,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:47,102 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:05:47,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:47,120 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:05:47,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:05:47,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:47,231 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:05:47,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:47,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:47,251 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-06-06 00:05:47,443 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-06 00:05:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:47,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580470413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:47,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:47,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:05:47,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387381939] [2021-06-06 00:05:47,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:05:47,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:05:47,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:05:47,543 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:48,238 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-06 00:05:48,534 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-06 00:05:49,117 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-06-06 00:05:49,395 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-06 00:05:49,761 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:05:50,302 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-06-06 00:05:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:50,370 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-06-06 00:05:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:05:50,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:50,373 INFO L225 Difference]: With dead ends: 2080 [2021-06-06 00:05:50,373 INFO L226 Difference]: Without dead ends: 2065 [2021-06-06 00:05:50,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3366.5ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:05:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-06-06 00:05:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-06-06 00:05:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-06-06 00:05:50,393 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-06-06 00:05:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:50,393 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-06-06 00:05:50,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-06-06 00:05:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:50,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:50,395 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:50,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:50,595 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:50,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:50,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-06-06 00:05:50,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:50,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586602420] [2021-06-06 00:05:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:51,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586602420] [2021-06-06 00:05:51,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586602420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705995491] [2021-06-06 00:05:51,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:51,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:05:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:51,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:05:51,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:51,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:51,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:51,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:51,451 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:05:51,457 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:05:51,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:05:51,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:51,478 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:51,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:51,491 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:51,496 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:05:51,502 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:51,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:05:51,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:51,506 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:51,580 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:05:51,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:05:51,582 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:05:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:51,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705995491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:51,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:51,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:05:51,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268735320] [2021-06-06 00:05:51,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:05:51,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:51,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:05:51,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:05:51,633 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:52,511 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-06-06 00:05:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:05:52,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:52,514 INFO L225 Difference]: With dead ends: 1986 [2021-06-06 00:05:52,514 INFO L226 Difference]: Without dead ends: 1965 [2021-06-06 00:05:52,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1200.4ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:05:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-06 00:05:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-06-06 00:05:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-06-06 00:05:52,532 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-06-06 00:05:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:52,532 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-06-06 00:05:52,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-06-06 00:05:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:52,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:52,534 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:52,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-06 00:05:52,735 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:52,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-06-06 00:05:52,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:52,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150162593] [2021-06-06 00:05:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:53,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150162593] [2021-06-06 00:05:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150162593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:53,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371358919] [2021-06-06 00:05:53,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:53,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:05:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:05:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:53,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:53,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:05:53,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,564 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:53,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,574 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:53,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,593 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:05:53,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,615 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:05:53,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:05:53,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,636 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:53,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:05:53,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,648 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:05:53,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,658 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:53,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,678 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:05:53,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:05:53,682 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,699 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:05:53,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:05:53,701 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,710 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:05:53,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,720 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:53,721 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,730 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:53,731 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:53,749 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:05:53,765 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,771 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:05:53,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:53,772 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:53,879 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-06 00:05:53,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:53,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:53,892 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-06-06 00:05:54,124 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-06 00:05:54,354 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-06 00:05:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:54,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371358919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:54,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:54,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-06 00:05:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513052953] [2021-06-06 00:05:54,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:05:54,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:05:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:05:54,469 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:55,140 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:05:55,503 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-06 00:05:55,677 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:05:56,183 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-06 00:05:56,913 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-06 00:05:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:05:56,983 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-06-06 00:05:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:05:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:05:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:05:56,987 INFO L225 Difference]: With dead ends: 2168 [2021-06-06 00:05:56,987 INFO L226 Difference]: Without dead ends: 2143 [2021-06-06 00:05:56,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3042.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:05:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-06 00:05:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-06-06 00:05:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-06-06 00:05:57,007 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-06-06 00:05:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:05:57,008 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-06-06 00:05:57,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-06-06 00:05:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:05:57,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:05:57,010 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:05:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-06 00:05:57,213 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:05:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:05:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-06-06 00:05:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:05:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568899667] [2021-06-06 00:05:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:05:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:05:57,437 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-06 00:05:57,564 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-06-06 00:05:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:57,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:05:57,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568899667] [2021-06-06 00:05:57,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568899667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:57,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127848511] [2021-06-06 00:05:57,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:05:57,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:05:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:05:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:05:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:05:58,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:58,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:58,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:05:58,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:58,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:05:58,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,209 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:05:58,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:58,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,229 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:58,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:05:58,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:05:58,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,262 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:05:58,263 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,271 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:05:58,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:58,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:05:58,286 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,298 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:05:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:05:58,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:05:58,312 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:05:58,328 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,336 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:05:58,337 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:05:58,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:05:58,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:05:58,344 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:05:58,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:05:58,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:05:58,433 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-06 00:05:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:05:58,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127848511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:05:58,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:05:58,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:05:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724453418] [2021-06-06 00:05:58,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:05:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:05:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:05:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:05:58,634 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:05:59,510 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-06-06 00:05:59,959 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-06 00:06:00,191 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-06 00:06:00,512 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-06 00:06:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:00,562 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-06-06 00:06:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:06:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:00,565 INFO L225 Difference]: With dead ends: 2090 [2021-06-06 00:06:00,565 INFO L226 Difference]: Without dead ends: 2061 [2021-06-06 00:06:00,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2354.6ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:06:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-06 00:06:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-06-06 00:06:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-06-06 00:06:00,585 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-06-06 00:06:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:00,585 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-06-06 00:06:00,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-06-06 00:06:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:00,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:00,588 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:00,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:00,788 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-06-06 00:06:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:00,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947431753] [2021-06-06 00:06:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:01,012 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-06 00:06:01,138 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-06-06 00:06:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:01,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947431753] [2021-06-06 00:06:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947431753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790086922] [2021-06-06 00:06:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:01,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:06:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:01,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:01,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:06:01,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:01,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:06:01,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:01,806 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-06 00:06:01,806 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-06-06 00:06:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:01,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:01,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:01,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:01,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:01,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:01,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:01,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-06-06 00:06:01,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:06:01,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-06-06 00:06:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:01,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790086922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:01,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:01,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:06:01,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966009186] [2021-06-06 00:06:01,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:06:01,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:06:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:06:01,968 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:02,284 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-06-06 00:06:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:06:02,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:02,286 INFO L225 Difference]: With dead ends: 1662 [2021-06-06 00:06:02,286 INFO L226 Difference]: Without dead ends: 1647 [2021-06-06 00:06:02,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 787.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-06 00:06:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-06-06 00:06:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-06-06 00:06:02,302 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-06-06 00:06:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:02,302 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-06-06 00:06:02,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-06-06 00:06:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:02,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:02,304 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:02,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:02,505 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-06-06 00:06:02,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:02,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990914888] [2021-06-06 00:06:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:02,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:02,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990914888] [2021-06-06 00:06:02,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990914888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:02,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23366765] [2021-06-06 00:06:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:02,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:02,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:06:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:03,408 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-06-06 00:06:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:06:03,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:06:03,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,592 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-06 00:06:03,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,606 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:03,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:06:03,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:06:03,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,743 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-06 00:06:03,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,757 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:06:03,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-06 00:06:03,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-06 00:06:03,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,886 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-06 00:06:03,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:03,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-06 00:06:03,903 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:03,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:03,914 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:06:03,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-06 00:06:03,916 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:04,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:04,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:06:04,020 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-06-06 00:06:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:04,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23366765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:04,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:04,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:06:04,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259698230] [2021-06-06 00:06:04,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:06:04,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:06:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:06:04,216 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:05,436 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-06 00:06:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:05,503 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-06-06 00:06:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:06:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:05,507 INFO L225 Difference]: With dead ends: 2262 [2021-06-06 00:06:05,507 INFO L226 Difference]: Without dead ends: 2212 [2021-06-06 00:06:05,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1659.3ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:06:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-06 00:06:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-06-06 00:06:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-06-06 00:06:05,528 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-06-06 00:06:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:05,528 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-06-06 00:06:05,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-06-06 00:06:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:05,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:05,530 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:05,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-06 00:06:05,730 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:05,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-06-06 00:06:05,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:05,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733644266] [2021-06-06 00:06:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:05,976 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-06-06 00:06:06,111 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-06-06 00:06:06,261 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-06 00:06:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:06,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733644266] [2021-06-06 00:06:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733644266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903682745] [2021-06-06 00:06:06,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:06,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:06,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:06,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:06:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:06,833 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:06:07,024 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-06 00:06:07,100 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-06-06 00:06:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:07,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:07,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:07,212 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-06 00:06:07,213 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-06 00:06:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:07,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:07,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:07,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:07,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:07,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:07,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:07,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:07,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:07,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:07,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:07,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:06:07,308 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-06 00:06:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:07,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903682745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:07,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:07,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:06:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008157746] [2021-06-06 00:06:07,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:07,364 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:08,249 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:06:08,629 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-06-06 00:06:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:08,734 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-06-06 00:06:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:06:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:08,737 INFO L225 Difference]: With dead ends: 1991 [2021-06-06 00:06:08,737 INFO L226 Difference]: Without dead ends: 1976 [2021-06-06 00:06:08,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2124.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:06:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-06 00:06:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-06-06 00:06:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-06-06 00:06:08,755 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-06-06 00:06:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:08,755 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-06-06 00:06:08,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-06-06 00:06:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:08,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:08,757 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:08,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-06 00:06:08,958 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-06-06 00:06:08,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:08,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652575409] [2021-06-06 00:06:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:09,169 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-06 00:06:09,308 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-06 00:06:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:09,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652575409] [2021-06-06 00:06:09,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652575409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76032525] [2021-06-06 00:06:09,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:06:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,771 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:06:09,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:09,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-06 00:06:09,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,801 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:09,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:06:09,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:06:09,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,836 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:06:09,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-06 00:06:09,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,875 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:06:09,876 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-06 00:06:09,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:09,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-06 00:06:09,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:06:09,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,956 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:06:09,957 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,972 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:06:09,973 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:09,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:06:09,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:09,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:09,999 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:09,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:06:10,000 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:10,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:10,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:10,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:10,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:10,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:10,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-06 00:06:10,013 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:10,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:10,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:10,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:10,022 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:10,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-06 00:06:10,024 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:10,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:10,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:06:10,097 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-06 00:06:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76032525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:10,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:10,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:06:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472481726] [2021-06-06 00:06:10,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:06:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:06:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:06:10,300 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:10,930 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:06:11,109 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-06 00:06:11,541 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-06 00:06:11,698 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-06 00:06:11,891 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-06 00:06:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:11,984 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-06-06 00:06:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:06:11,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:11,986 INFO L225 Difference]: With dead ends: 2102 [2021-06-06 00:06:11,987 INFO L226 Difference]: Without dead ends: 2083 [2021-06-06 00:06:11,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2078.8ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:06:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-06 00:06:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-06-06 00:06:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-06-06 00:06:12,006 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-06-06 00:06:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:12,006 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-06-06 00:06:12,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-06-06 00:06:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:12,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:12,007 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:12,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:12,208 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-06-06 00:06:12,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:12,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107519767] [2021-06-06 00:06:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:12,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:12,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107519767] [2021-06-06 00:06:12,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107519767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:12,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471633573] [2021-06-06 00:06:12,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:12,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:12,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:06:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,787 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:12,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:12,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,807 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:12,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:06:12,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,816 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:06:12,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:12,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:06:12,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:12,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:06:12,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,847 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:06:12,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:12,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:06:12,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:12,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:06:12,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,880 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:06:12,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:06:12,890 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:12,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:06:12,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,913 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:12,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:06:12,914 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:06:12,928 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:06:12,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:12,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:06:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:06:12,942 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:13,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:13,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:06:13,026 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:06:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:13,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471633573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:13,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:13,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:06:13,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278523746] [2021-06-06 00:06:13,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:06:13,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:06:13,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:06:13,223 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:13,788 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:06:14,450 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-06 00:06:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:14,514 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-06-06 00:06:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:06:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:14,518 INFO L225 Difference]: With dead ends: 2116 [2021-06-06 00:06:14,518 INFO L226 Difference]: Without dead ends: 2091 [2021-06-06 00:06:14,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1533.3ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:06:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-06 00:06:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-06-06 00:06:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-06-06 00:06:14,539 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-06-06 00:06:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:14,539 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-06-06 00:06:14,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-06-06 00:06:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:14,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:14,541 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:14,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-06-06 00:06:14,742 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-06 00:06:14,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:14,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840235716] [2021-06-06 00:06:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:15,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:15,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840235716] [2021-06-06 00:06:15,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840235716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:15,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418396410] [2021-06-06 00:06:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:15,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:06:15,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:15,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:06:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:06:15,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-06 00:06:15,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-06 00:06:15,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:06:15,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-06 00:06:15,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-06 00:06:15,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:06:15,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:06:15,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-06 00:06:15,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-06-06 00:06:15,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:15,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:06:15,994 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:06:16,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-06 00:06:16,013 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-06 00:06:16,021 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:16,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-06 00:06:16,029 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:16,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:06:16,034 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:16,067 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-06 00:06:16,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:06:16,068 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-06 00:06:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:16,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418396410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:16,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:16,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:06:16,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169399357] [2021-06-06 00:06:16,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:06:16,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:16,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:06:16,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:06:16,099 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:17,738 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-06-06 00:06:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:06:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:17,741 INFO L225 Difference]: With dead ends: 2097 [2021-06-06 00:06:17,741 INFO L226 Difference]: Without dead ends: 2071 [2021-06-06 00:06:17,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1902.0ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:06:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-06 00:06:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-06-06 00:06:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-06-06 00:06:17,761 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-06-06 00:06:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:17,761 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-06-06 00:06:17,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-06-06 00:06:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:17,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:17,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:17,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-06-06 00:06:17,963 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-06 00:06:17,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:17,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131839022] [2021-06-06 00:06:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:18,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:18,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131839022] [2021-06-06 00:06:18,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131839022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:18,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583770994] [2021-06-06 00:06:18,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:06:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:18,835 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-06 00:06:18,898 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-06-06 00:06:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:18,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:18,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:06:18,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:18,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:06:18,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:19,048 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-06 00:06:19,048 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-06-06 00:06:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:19,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-06 00:06:19,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:19,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:19,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:19,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:06:19,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:19,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:19,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:19,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:06:19,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:19,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:19,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:06:19,159 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-06-06 00:06:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:19,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583770994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:19,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:19,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:06:19,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091719441] [2021-06-06 00:06:19,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:19,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:19,207 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:20,981 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-06 00:06:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:21,113 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-06-06 00:06:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:06:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:21,117 INFO L225 Difference]: With dead ends: 2270 [2021-06-06 00:06:21,117 INFO L226 Difference]: Without dead ends: 2255 [2021-06-06 00:06:21,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2174.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:06:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-06 00:06:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-06-06 00:06:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-06-06 00:06:21,140 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-06-06 00:06:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:21,140 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-06-06 00:06:21,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-06-06 00:06:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:21,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:21,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:21,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:21,343 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-06-06 00:06:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:21,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754494484] [2021-06-06 00:06:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:21,599 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-06-06 00:06:21,736 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-06 00:06:21,885 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-06 00:06:22,042 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-06 00:06:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:22,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754494484] [2021-06-06 00:06:22,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754494484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70925676] [2021-06-06 00:06:22,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:22,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:22,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:06:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:22,459 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-06 00:06:22,637 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-06 00:06:22,940 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-06-06 00:06:23,008 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-06-06 00:06:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:23,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:23,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:06:23,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:23,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:23,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:23,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:23,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:23,267 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-06 00:06:23,268 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-06-06 00:06:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:23,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:23,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:23,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:23,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:23,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:23,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:23,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:23,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:23,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:23,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:06:23,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:23,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:23,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:06:23,447 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-06-06 00:06:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:23,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70925676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:23,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:23,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:06:23,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407621048] [2021-06-06 00:06:23,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:23,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:23,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:23,504 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:23,935 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-06 00:06:24,257 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-06 00:06:24,426 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-06 00:06:24,904 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-06-06 00:06:25,515 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-06-06 00:06:26,058 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-06-06 00:06:26,707 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-06-06 00:06:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:26,835 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-06-06 00:06:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:06:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:26,838 INFO L225 Difference]: With dead ends: 2122 [2021-06-06 00:06:26,838 INFO L226 Difference]: Without dead ends: 2107 [2021-06-06 00:06:26,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4136.9ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:06:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-06 00:06:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-06-06 00:06:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-06-06 00:06:26,857 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-06-06 00:06:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:26,857 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-06-06 00:06:26,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-06-06 00:06:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:26,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:26,859 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:27,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-06-06 00:06:27,060 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:27,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-06 00:06:27,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:27,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828658127] [2021-06-06 00:06:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:27,579 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-06-06 00:06:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:27,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:27,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828658127] [2021-06-06 00:06:27,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828658127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:27,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002592609] [2021-06-06 00:06:27,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:06:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:27,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:06:27,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:28,195 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-06 00:06:28,547 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-06-06 00:06:28,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:28,572 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:06:28,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-06 00:06:28,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:28,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:28,598 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:06:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-06 00:06:28,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:28,807 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-06 00:06:28,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:28,828 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:06:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-06 00:06:28,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:28,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:28,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-06 00:06:28,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:29,025 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-06 00:06:29,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:29,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:29,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:29,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-06 00:06:29,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:29,072 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:06:29,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:06:29,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:29,225 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-06 00:06:29,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:29,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:29,251 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:06:29,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:06:29,252 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:29,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:29,271 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:06:29,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:06:29,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:29,407 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:06:29,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:29,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:06:29,425 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-06-06 00:06:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:29,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002592609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:29,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:29,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:06:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62404809] [2021-06-06 00:06:29,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:06:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:06:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:06:29,601 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:30,266 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-06 00:06:31,894 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-06 00:06:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:32,494 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-06-06 00:06:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:06:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:32,497 INFO L225 Difference]: With dead ends: 2550 [2021-06-06 00:06:32,497 INFO L226 Difference]: Without dead ends: 2506 [2021-06-06 00:06:32,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3442.6ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:06:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-06-06 00:06:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-06-06 00:06:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-06-06 00:06:32,518 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-06-06 00:06:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:32,519 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-06-06 00:06:32,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-06-06 00:06:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:32,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:32,521 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:32,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:32,725 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-06-06 00:06:32,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:32,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462568830] [2021-06-06 00:06:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:33,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462568830] [2021-06-06 00:06:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462568830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489337394] [2021-06-06 00:06:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:06:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:06:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:33,536 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:06:33,751 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:06:34,068 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:06:34,463 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-06 00:06:34,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-06-06 00:06:34,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:34,523 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-06 00:06:34,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 38 [2021-06-06 00:06:34,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:35,597 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-06-06 00:06:35,597 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-06-06 00:06:35,668 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-06 00:06:35,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-06-06 00:06:35,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:35,723 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-06 00:06:35,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-06-06 00:06:35,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:36,258 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-06 00:06:36,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:36,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:36,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-06-06 00:06:36,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:36,398 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-06 00:06:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-06-06 00:06:36,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:38,016 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-06-06 00:06:38,017 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-06-06 00:06:38,085 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-06 00:06:38,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-06-06 00:06:38,096 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:38,173 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-06-06 00:06:38,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-06-06 00:06:38,186 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:39,271 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-06-06 00:06:39,271 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-06-06 00:06:39,334 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-06 00:06:39,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-06 00:06:39,342 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:39,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-06-06 00:06:39,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:39,932 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-06 00:06:39,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:40,003 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-06 00:06:40,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-06-06 00:06:40,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:40,071 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-06 00:06:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-06-06 00:06:40,090 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:41,066 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-06-06 00:06:41,067 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-06-06 00:06:41,128 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-06 00:06:41,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-06 00:06:41,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:41,189 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-06 00:06:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-06-06 00:06:41,193 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:41,670 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-06 00:06:41,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:41,732 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-06 00:06:41,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-06-06 00:06:41,736 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:41,790 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-06 00:06:41,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-06-06 00:06:41,809 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:42,659 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-06-06 00:06:42,660 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-06-06 00:06:42,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-06 00:06:42,774 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-06-06 00:06:43,461 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-06-06 00:06:43,632 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-06 00:06:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:43,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489337394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:43,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:43,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-06 00:06:43,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917401446] [2021-06-06 00:06:43,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:06:43,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:43,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:06:43,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:06:43,661 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:46,253 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-06 00:06:46,664 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-06 00:06:47,386 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-06-06 00:06:47,798 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-06 00:06:48,162 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-06 00:06:48,335 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-06-06 00:06:48,972 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-06-06 00:06:49,485 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-06-06 00:06:50,446 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-06-06 00:06:50,856 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-06 00:06:51,101 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-06-06 00:06:51,257 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-06-06 00:06:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:51,397 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-06-06 00:06:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:06:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:51,401 INFO L225 Difference]: With dead ends: 3086 [2021-06-06 00:06:51,402 INFO L226 Difference]: Without dead ends: 3056 [2021-06-06 00:06:51,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 8147.0ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:06:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-06 00:06:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-06-06 00:06:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-06-06 00:06:51,428 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-06-06 00:06:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:51,428 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-06-06 00:06:51,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-06-06 00:06:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:51,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:51,430 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:51,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:51,631 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-06-06 00:06:51,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:51,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867484721] [2021-06-06 00:06:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:51,839 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-06 00:06:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:52,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:52,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867484721] [2021-06-06 00:06:52,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867484721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:52,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935606381] [2021-06-06 00:06:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:52,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:06:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:52,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:06:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:52,596 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:06:52,865 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-06 00:06:52,935 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-06-06 00:06:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:52,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:52,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:53,064 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-06 00:06:53,064 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-06-06 00:06:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:53,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:53,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:53,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:53,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:06:53,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:53,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:53,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:06:53,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:06:53,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:53,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:53,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:06:53,168 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:53,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:53,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:06:53,206 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-06-06 00:06:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:53,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935606381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:53,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:53,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:06:53,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262197047] [2021-06-06 00:06:53,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:06:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:06:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:06:53,262 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:53,640 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-06 00:06:53,901 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-06 00:06:54,724 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-06 00:06:54,864 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-06 00:06:55,097 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-06 00:06:55,342 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-06-06 00:06:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:06:55,511 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-06-06 00:06:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:06:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:06:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:06:55,515 INFO L225 Difference]: With dead ends: 2244 [2021-06-06 00:06:55,515 INFO L226 Difference]: Without dead ends: 2229 [2021-06-06 00:06:55,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2727.0ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:06:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-06-06 00:06:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-06-06 00:06:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-06-06 00:06:55,536 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-06-06 00:06:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:06:55,536 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-06-06 00:06:55,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-06-06 00:06:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:06:55,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:06:55,538 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:06:55,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:55,739 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:06:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:06:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-06-06 00:06:55,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:06:55,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994368277] [2021-06-06 00:06:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:06:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:06:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:56,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:06:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994368277] [2021-06-06 00:06:56,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994368277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163525680] [2021-06-06 00:06:56,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:06:56,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:06:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:06:56,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:06:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:06:56,635 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-06 00:06:56,840 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:06:56,891 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-06-06 00:06:56,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:56,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:56,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:06:56,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,026 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-06 00:06:57,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:06:57,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,162 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:06:57,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:06:57,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,306 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:06:57,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:06:57,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,429 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:06:57,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:06:57,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,548 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-06 00:06:57,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:06:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:06:57,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,661 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-06 00:06:57,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,673 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:06:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-06 00:06:57,675 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:06:57,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-06 00:06:57,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:06:57,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:06:57,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:06:57,880 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-06-06 00:06:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:06:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163525680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:06:58,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:06:58,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:06:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630372572] [2021-06-06 00:06:58,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:06:58,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:06:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:06:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:06:58,068 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:06:58,402 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-06 00:06:59,476 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-06 00:07:00,006 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-06-06 00:07:00,424 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-06-06 00:07:00,863 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-06-06 00:07:01,377 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-06-06 00:07:01,870 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-06-06 00:07:02,118 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-06 00:07:02,469 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-06 00:07:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:02,636 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-06-06 00:07:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:07:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:02,641 INFO L225 Difference]: With dead ends: 2686 [2021-06-06 00:07:02,641 INFO L226 Difference]: Without dead ends: 2652 [2021-06-06 00:07:02,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4682.6ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:07:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-06 00:07:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-06-06 00:07:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-06-06 00:07:02,667 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-06-06 00:07:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:02,667 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-06-06 00:07:02,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-06-06 00:07:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:02,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:02,669 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:02,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-06-06 00:07:02,869 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-06-06 00:07:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:02,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188041710] [2021-06-06 00:07:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:03,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:03,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188041710] [2021-06-06 00:07:03,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188041710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:03,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142114143] [2021-06-06 00:07:03,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:03,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:03,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:07:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-06 00:07:03,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-06 00:07:03,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:07:03,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:07:03,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-06 00:07:03,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:07:03,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:07:03,935 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-06 00:07:03,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:07:03,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:07:03,966 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:07:03,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:07:03,983 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:03,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:03,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-06-06 00:07:03,994 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:04,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:04,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-06 00:07:04,009 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:04,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:04,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-06 00:07:04,022 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:04,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:04,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:07:04,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:04,102 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-06-06 00:07:04,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:04,103 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-06-06 00:07:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:04,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142114143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:04,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:04,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:07:04,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143244057] [2021-06-06 00:07:04,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:04,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:04,140 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:04,835 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-06-06 00:07:05,529 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-06 00:07:05,975 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-06 00:07:06,182 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-06 00:07:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:06,896 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-06-06 00:07:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:07:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:06,901 INFO L225 Difference]: With dead ends: 3384 [2021-06-06 00:07:06,901 INFO L226 Difference]: Without dead ends: 3348 [2021-06-06 00:07:06,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2763.5ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:07:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-06-06 00:07:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-06-06 00:07:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-06-06 00:07:06,929 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-06-06 00:07:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:06,929 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-06-06 00:07:06,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-06-06 00:07:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:06,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:06,931 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:07,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:07,132 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-06-06 00:07:07,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:07,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939598713] [2021-06-06 00:07:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:07,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:07,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939598713] [2021-06-06 00:07:07,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939598713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:07,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946948383] [2021-06-06 00:07:07,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:07,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:07,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:07:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,020 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:07:08,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 37 [2021-06-06 00:07:08,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,056 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-06 00:07:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-06-06 00:07:08,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,087 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:07:08,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-06 00:07:08,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,117 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-06 00:07:08,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-06 00:07:08,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,146 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-06 00:07:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-06-06 00:07:08,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,166 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:07:08,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,194 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-06 00:07:08,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-06-06 00:07:08,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,214 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:07:08,214 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,233 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:07:08,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,251 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:07:08,252 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,278 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-06 00:07:08,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-06-06 00:07:08,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,296 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-06-06 00:07:08,297 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,316 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:07:08,316 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,333 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:07:08,334 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-06 00:07:08,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:08,375 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-06 00:07:08,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:07:08,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:08,545 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-06-06 00:07:08,545 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-06-06 00:07:08,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:08,547 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-06 00:07:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946948383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:08,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:08,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:07:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200309165] [2021-06-06 00:07:08,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:08,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:08,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:08,696 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:09,985 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-06-06 00:07:10,497 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-06 00:07:10,735 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-06 00:07:10,950 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-06 00:07:11,437 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-06 00:07:11,695 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-06 00:07:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:11,946 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-06-06 00:07:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:07:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:11,951 INFO L225 Difference]: With dead ends: 3832 [2021-06-06 00:07:11,951 INFO L226 Difference]: Without dead ends: 3775 [2021-06-06 00:07:11,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3273.0ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:07:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-06 00:07:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-06-06 00:07:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-06-06 00:07:11,993 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-06-06 00:07:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:11,993 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-06-06 00:07:11,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-06-06 00:07:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:11,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:11,995 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:12,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-06 00:07:12,196 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-06-06 00:07:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:12,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551119173] [2021-06-06 00:07:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:12,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:12,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551119173] [2021-06-06 00:07:12,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551119173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:12,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012018215] [2021-06-06 00:07:12,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:12,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:12,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:07:12,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:13,188 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-06 00:07:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:13,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:07:13,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:13,842 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-06 00:07:13,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:13,864 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:07:13,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:07:13,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:14,011 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-06 00:07:14,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:14,035 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:14,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:07:14,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:14,180 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-06 00:07:14,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:14,206 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:14,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:07:14,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:14,351 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-06 00:07:14,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:14,375 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:14,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:07:14,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:14,516 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-06 00:07:14,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:14,554 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:07:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:07:14,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:14,693 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:07:14,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:14,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:07:14,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:14,850 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-06 00:07:14,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:14,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:14,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:07:14,873 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:15,008 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-06 00:07:15,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:15,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:15,030 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-06-06 00:07:15,342 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-06 00:07:15,592 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-06 00:07:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:15,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012018215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:15,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:15,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:07:15,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176615142] [2021-06-06 00:07:15,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:15,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:15,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:15,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:15,713 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:15,993 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-06-06 00:07:16,209 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-06 00:07:16,779 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-06 00:07:16,958 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-06-06 00:07:17,297 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-06-06 00:07:17,627 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-06 00:07:18,218 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-06 00:07:18,715 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-06 00:07:19,116 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-06-06 00:07:19,398 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-06 00:07:19,968 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-06-06 00:07:20,192 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-06 00:07:20,434 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-06 00:07:20,946 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-06-06 00:07:21,602 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-06-06 00:07:22,074 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-06-06 00:07:22,983 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-06-06 00:07:23,378 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-06-06 00:07:23,802 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-06-06 00:07:24,200 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-06-06 00:07:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:24,263 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-06-06 00:07:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:07:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:24,267 INFO L225 Difference]: With dead ends: 2671 [2021-06-06 00:07:24,267 INFO L226 Difference]: Without dead ends: 2637 [2021-06-06 00:07:24,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 9027.5ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:07:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-06 00:07:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-06-06 00:07:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-06-06 00:07:24,291 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-06-06 00:07:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:24,291 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-06-06 00:07:24,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-06-06 00:07:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:24,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:24,293 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:24,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-06-06 00:07:24,494 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-06-06 00:07:24,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:24,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799693392] [2021-06-06 00:07:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:24,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:24,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799693392] [2021-06-06 00:07:24,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799693392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:24,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289909064] [2021-06-06 00:07:24,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:24,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:25,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-06 00:07:25,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,130 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:07:25,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:25,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-06 00:07:25,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,158 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-06 00:07:25,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,172 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-06 00:07:25,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,183 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:07:25,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-06 00:07:25,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,204 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-06-06 00:07:25,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,214 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-06 00:07:25,214 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,224 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-06 00:07:25,225 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:07:25,235 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:07:25,248 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:25,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-06 00:07:25,262 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:25,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-06-06 00:07:25,276 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:25,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-06 00:07:25,288 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:25,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:07:25,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:07:25,295 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:25,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:25,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:25,373 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-06-06 00:07:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:25,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289909064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:25,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:25,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:07:25,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723474305] [2021-06-06 00:07:25,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:07:25,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:07:25,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:25,612 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:26,475 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-06 00:07:27,348 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-06 00:07:27,714 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-06 00:07:27,980 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-06-06 00:07:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:28,150 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-06-06 00:07:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:07:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:28,154 INFO L225 Difference]: With dead ends: 2618 [2021-06-06 00:07:28,154 INFO L226 Difference]: Without dead ends: 2584 [2021-06-06 00:07:28,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2550.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:07:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-06 00:07:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-06-06 00:07:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-06-06 00:07:28,178 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-06-06 00:07:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:28,178 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-06-06 00:07:28,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-06-06 00:07:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:28,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:28,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:28,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:28,381 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-06-06 00:07:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:28,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124302370] [2021-06-06 00:07:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:28,606 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-06 00:07:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:28,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124302370] [2021-06-06 00:07:28,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124302370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311037412] [2021-06-06 00:07:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:28,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:28,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:29,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:29,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:07:29,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,347 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:07:29,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,488 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:07:29,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:29,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:29,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:07:29,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:29,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:07:29,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,666 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:07:29,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:29,685 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:07:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:07:29,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,704 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:29,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:07:29,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,841 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:07:29,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:29,879 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:07:29,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:07:29,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:29,901 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:07:29,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:07:29,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:30,062 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-06 00:07:30,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:30,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:07:30,081 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-06-06 00:07:30,339 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-06 00:07:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:30,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311037412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:30,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:30,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:07:30,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312300197] [2021-06-06 00:07:30,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:30,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:30,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:30,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:30,610 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:30,789 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 27 [2021-06-06 00:07:31,285 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-06 00:07:31,432 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-06-06 00:07:31,656 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-06 00:07:32,299 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-06 00:07:32,676 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-06 00:07:32,962 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-06-06 00:07:33,333 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-06 00:07:33,736 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-06 00:07:34,030 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-06 00:07:34,334 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-06-06 00:07:34,683 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-06 00:07:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:35,027 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-06-06 00:07:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:07:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:35,031 INFO L225 Difference]: With dead ends: 2647 [2021-06-06 00:07:35,031 INFO L226 Difference]: Without dead ends: 2578 [2021-06-06 00:07:35,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4742.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:07:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-06 00:07:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-06-06 00:07:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-06-06 00:07:35,054 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-06-06 00:07:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:35,054 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-06-06 00:07:35,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-06-06 00:07:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:35,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:35,056 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:35,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:35,261 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-06-06 00:07:35,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:35,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885023036] [2021-06-06 00:07:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:35,465 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-06 00:07:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:35,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:35,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885023036] [2021-06-06 00:07:35,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885023036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:35,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838986319] [2021-06-06 00:07:35,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:35,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:07:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:07:36,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:07:36,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:07:36,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:07:36,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:07:36,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:07:36,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:07:36,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:07:36,453 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:07:36,461 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-06-06 00:07:36,468 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:07:36,475 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:07:36,483 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:07:36,490 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:07:36,498 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:07:36,505 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:36,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:07:36,509 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:36,541 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-06-06 00:07:36,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:36,542 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-06-06 00:07:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838986319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:36,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:36,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:07:36,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258420287] [2021-06-06 00:07:36,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:07:36,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:07:36,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:07:36,572 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:37,122 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-06 00:07:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:38,248 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-06-06 00:07:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:07:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:38,252 INFO L225 Difference]: With dead ends: 2336 [2021-06-06 00:07:38,252 INFO L226 Difference]: Without dead ends: 2314 [2021-06-06 00:07:38,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1952.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:07:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-06 00:07:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-06-06 00:07:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-06-06 00:07:38,272 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-06-06 00:07:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:38,272 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-06-06 00:07:38,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-06-06 00:07:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:38,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:38,274 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:38,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-06-06 00:07:38,475 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:38,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-06-06 00:07:38,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:38,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153951945] [2021-06-06 00:07:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:38,695 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-06 00:07:38,817 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-06-06 00:07:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:39,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:39,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153951945] [2021-06-06 00:07:39,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153951945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:39,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617330448] [2021-06-06 00:07:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:07:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:39,438 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-06 00:07:39,502 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-06-06 00:07:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:07:39,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,604 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-06-06 00:07:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:07:39,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:39,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:07:39,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:39,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:39,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:07:39,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:39,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:39,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:07:39,702 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-06-06 00:07:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:39,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617330448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:39,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:39,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:07:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367091581] [2021-06-06 00:07:39,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:07:39,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:39,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:07:39,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:39,752 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:41,055 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-06-06 00:07:41,779 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-06-06 00:07:42,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-06 00:07:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:42,492 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-06-06 00:07:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:07:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:42,496 INFO L225 Difference]: With dead ends: 2526 [2021-06-06 00:07:42,496 INFO L226 Difference]: Without dead ends: 2511 [2021-06-06 00:07:42,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2959.5ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:07:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-06 00:07:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-06-06 00:07:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-06-06 00:07:42,518 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-06-06 00:07:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:42,519 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-06-06 00:07:42,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-06-06 00:07:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:42,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:42,521 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:42,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:42,721 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-06-06 00:07:42,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:42,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888778496] [2021-06-06 00:07:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:43,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:43,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888778496] [2021-06-06 00:07:43,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888778496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:43,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918123073] [2021-06-06 00:07:43,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:43,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:07:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,426 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-06 00:07:43,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-06 00:07:43,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,455 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-06 00:07:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-06-06 00:07:43,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,482 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-06 00:07:43,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-06 00:07:43,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,508 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-06 00:07:43,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-06 00:07:43,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,528 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:07:43,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,554 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-06 00:07:43,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-06-06 00:07:43,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,582 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-06 00:07:43,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-06 00:07:43,586 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,603 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:07:43,604 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,621 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:07:43,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,647 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-06 00:07:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-06-06 00:07:43,648 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:43,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-06 00:07:43,683 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,700 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:07:43,701 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,717 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:07:43,718 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,733 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:07:43,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,755 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:07:43,756 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:43,765 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:07:43,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:07:43,766 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:43,855 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-06-06 00:07:43,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:43,856 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-06-06 00:07:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918123073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:43,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:43,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-06 00:07:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122283163] [2021-06-06 00:07:43,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:43,952 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:46,684 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-06 00:07:47,098 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-06 00:07:47,559 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-06 00:07:47,808 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-06 00:07:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:48,191 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-06-06 00:07:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:07:48,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:48,195 INFO L225 Difference]: With dead ends: 3017 [2021-06-06 00:07:48,196 INFO L226 Difference]: Without dead ends: 2970 [2021-06-06 00:07:48,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3961.8ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:07:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-06 00:07:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-06-06 00:07:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-06-06 00:07:48,222 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-06-06 00:07:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:48,222 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-06-06 00:07:48,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-06-06 00:07:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:48,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:48,224 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:48,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-06-06 00:07:48,425 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-06 00:07:48,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:48,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84515828] [2021-06-06 00:07:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:48,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84515828] [2021-06-06 00:07:48,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84515828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817137770] [2021-06-06 00:07:48,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:48,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:07:48,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:07:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:49,242 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:07:49,474 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-06-06 00:07:49,555 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:07:49,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-06-06 00:07:49,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:49,636 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-06 00:07:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-06-06 00:07:49,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,700 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-06-06 00:07:50,701 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-06-06 00:07:50,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:50,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-06 00:07:50,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,810 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:07:50,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-06-06 00:07:50,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:52,376 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-06-06 00:07:52,376 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-06-06 00:07:52,442 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:07:52,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-06 00:07:52,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:52,510 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:07:52,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-06 00:07:52,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:53,548 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-06-06 00:07:53,549 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-06-06 00:07:53,609 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:07:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-06 00:07:53,616 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:53,661 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:07:53,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-06 00:07:53,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:54,676 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-06-06 00:07:54,677 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-06-06 00:07:54,732 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:07:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-06-06 00:07:54,736 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:54,780 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:07:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-06 00:07:54,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:55,263 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-06 00:07:55,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:55,307 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-06 00:07:55,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-06 00:07:55,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:55,354 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:07:55,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-06 00:07:55,357 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:55,832 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-06 00:07:55,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:55,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:55,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-06 00:07:55,885 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:55,930 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:07:55,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-06 00:07:55,937 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,396 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-06 00:07:56,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,445 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:07:56,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-06 00:07:56,457 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,473 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:07:56,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:07:56,473 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,878 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-06 00:07:56,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:56,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-06 00:07:56,922 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-06-06 00:07:57,479 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-06-06 00:07:57,776 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-06 00:07:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817137770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:57,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:57,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-06 00:07:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337576546] [2021-06-06 00:07:57,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:07:57,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:57,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:07:57,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:07:57,940 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:58,280 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-06 00:07:58,645 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-06-06 00:07:58,851 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-06 00:07:59,227 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-06-06 00:07:59,712 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-06 00:08:00,209 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-06 00:08:00,371 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-06 00:08:00,914 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-06-06 00:08:01,394 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-06 00:08:01,788 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-06 00:08:01,958 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-06-06 00:08:02,269 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-06-06 00:08:02,884 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-06-06 00:08:03,169 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-06-06 00:08:03,408 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-06-06 00:08:04,206 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-06-06 00:08:05,115 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-06-06 00:08:05,450 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-06-06 00:08:05,940 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-06 00:08:06,167 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-06-06 00:08:06,382 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-06-06 00:08:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:06,508 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-06-06 00:08:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:08:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:06,512 INFO L225 Difference]: With dead ends: 3177 [2021-06-06 00:08:06,513 INFO L226 Difference]: Without dead ends: 3132 [2021-06-06 00:08:06,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 9180.6ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:08:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-06-06 00:08:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-06-06 00:08:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-06-06 00:08:06,541 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-06-06 00:08:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:06,541 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-06-06 00:08:06,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-06-06 00:08:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:06,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:06,544 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:06,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-06-06 00:08:06,744 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-06 00:08:06,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695313319] [2021-06-06 00:08:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:07,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:07,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695313319] [2021-06-06 00:08:07,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695313319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:07,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390017866] [2021-06-06 00:08:07,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:07,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:08:07,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:07,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:07,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:07,570 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-06 00:08:07,705 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-06-06 00:08:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:07,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:08:07,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-06-06 00:08:07,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,824 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-06 00:08:07,824 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-06-06 00:08:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-06 00:08:07,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:08:07,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:07,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:07,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:08:07,905 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:07,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:08:07,934 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-06-06 00:08:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390017866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:07,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:07,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:08:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999836047] [2021-06-06 00:08:07,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:07,982 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:09,320 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-06 00:08:09,510 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-06-06 00:08:10,009 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-06 00:08:10,191 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-06 00:08:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:10,403 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-06-06 00:08:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:08:10,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:10,407 INFO L225 Difference]: With dead ends: 2395 [2021-06-06 00:08:10,407 INFO L226 Difference]: Without dead ends: 2380 [2021-06-06 00:08:10,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2537.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:08:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-06 00:08:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-06-06 00:08:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-06-06 00:08:10,429 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-06-06 00:08:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:10,429 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-06-06 00:08:10,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-06-06 00:08:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:10,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:10,431 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:10,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-06-06 00:08:10,632 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-06 00:08:10,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:10,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522149546] [2021-06-06 00:08:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:11,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:11,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522149546] [2021-06-06 00:08:11,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522149546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:11,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500203986] [2021-06-06 00:08:11,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:11,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:08:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:11,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:11,480 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-06 00:08:11,687 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-06 00:08:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:11,922 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:08:11,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-06 00:08:11,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:11,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:11,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-06 00:08:11,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,350 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-06 00:08:12,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,394 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-06 00:08:12,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-06 00:08:12,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,425 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:08:12,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-06 00:08:12,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,810 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-06 00:08:12,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,846 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:08:12,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-06 00:08:12,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:12,874 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:08:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-06 00:08:12,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:13,255 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-06 00:08:13,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,292 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:08:13,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-06 00:08:13,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:13,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-06 00:08:13,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:13,975 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-06-06 00:08:13,976 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-06-06 00:08:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:14,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-06 00:08:14,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,043 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:08:14,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-06 00:08:14,047 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,655 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-06-06 00:08:14,655 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-06-06 00:08:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,685 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:08:14,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:08:14,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,712 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:08:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-06 00:08:14,715 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:15,003 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:08:15,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,039 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:08:15,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:08:15,043 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,056 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:08:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:08:15,057 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:15,288 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:08:15,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,315 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:08:15,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-06-06 00:08:15,317 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:15,339 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:08:15,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:08:15,343 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:15,743 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-06 00:08:15,743 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-06-06 00:08:15,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-06 00:08:15,757 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-06-06 00:08:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:15,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500203986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:15,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:15,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-06 00:08:15,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478028064] [2021-06-06 00:08:15,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:08:15,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:15,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:08:15,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:08:15,946 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:16,285 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-06 00:08:16,553 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-06 00:08:23,245 WARN L205 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-06 00:08:28,550 WARN L205 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-06 00:08:29,609 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-06-06 00:08:29,807 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-06 00:08:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:30,072 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-06-06 00:08:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:08:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:30,076 INFO L225 Difference]: With dead ends: 2712 [2021-06-06 00:08:30,076 INFO L226 Difference]: Without dead ends: 2682 [2021-06-06 00:08:30,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 14541.9ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:08:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-06 00:08:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-06-06 00:08:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-06-06 00:08:30,103 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-06-06 00:08:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:30,103 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-06-06 00:08:30,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-06-06 00:08:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:30,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:30,106 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:30,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-06-06 00:08:30,328 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-06-06 00:08:30,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:30,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021278470] [2021-06-06 00:08:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:30,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:30,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021278470] [2021-06-06 00:08:30,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021278470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:30,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413328893] [2021-06-06 00:08:30,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:30,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:08:30,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:30,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,074 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-06 00:08:31,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-06 00:08:31,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,106 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-06 00:08:31,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-06 00:08:31,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,127 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:08:31,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,145 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:08:31,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,173 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-06 00:08:31,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-06 00:08:31,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:31,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-06 00:08:31,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,225 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:08:31,226 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,242 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:08:31,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,260 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:08:31,261 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,286 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-06 00:08:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-06 00:08:31,287 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,303 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:08:31,304 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,320 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:08:31,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,336 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:08:31,337 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,354 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:08:31,354 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,370 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:08:31,371 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:31,380 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-06 00:08:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:08:31,381 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:31,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:31,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:31,423 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-06-06 00:08:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413328893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:31,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:31,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:08:31,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007911994] [2021-06-06 00:08:31,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:31,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:31,522 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:32,397 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-06 00:08:32,934 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-06 00:08:33,561 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-06 00:08:33,904 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-06 00:08:34,223 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-06 00:08:34,437 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-06 00:08:34,597 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-06 00:08:34,799 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-06 00:08:35,167 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-06 00:08:35,346 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-06-06 00:08:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:35,549 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-06-06 00:08:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:08:35,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:35,555 INFO L225 Difference]: With dead ends: 3398 [2021-06-06 00:08:35,555 INFO L226 Difference]: Without dead ends: 3364 [2021-06-06 00:08:35,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4112.8ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:08:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-06 00:08:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-06-06 00:08:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-06-06 00:08:35,597 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-06-06 00:08:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-06-06 00:08:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-06-06 00:08:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:35,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:35,599 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:35,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-06-06 00:08:35,801 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-06-06 00:08:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:35,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303769881] [2021-06-06 00:08:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:36,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303769881] [2021-06-06 00:08:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303769881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844825201] [2021-06-06 00:08:36,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:36,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:36,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:36,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:36,682 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-06 00:08:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:36,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:36,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:36,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:36,982 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-06 00:08:36,983 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-06-06 00:08:36,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:36,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:36,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:37,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:37,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:37,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:37,123 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:37,178 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-06-06 00:08:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844825201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:37,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:37,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:08:37,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646101280] [2021-06-06 00:08:37,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:08:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:08:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:08:37,231 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:38,028 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-06 00:08:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:38,214 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-06-06 00:08:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:08:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:38,217 INFO L225 Difference]: With dead ends: 2313 [2021-06-06 00:08:38,217 INFO L226 Difference]: Without dead ends: 2298 [2021-06-06 00:08:38,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1475.5ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:08:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-06 00:08:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-06-06 00:08:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-06-06 00:08:38,239 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-06-06 00:08:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:38,240 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-06-06 00:08:38,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-06-06 00:08:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:38,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:38,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:38,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-06-06 00:08:38,442 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-06-06 00:08:38,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:38,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530090439] [2021-06-06 00:08:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:38,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:38,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530090439] [2021-06-06 00:08:38,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530090439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:38,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632758124] [2021-06-06 00:08:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:38,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:08:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:38,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:38,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:39,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:39,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:39,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:08:39,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:39,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:39,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:39,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:08:39,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:39,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:39,257 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:39,264 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:08:39,271 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:39,277 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:39,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:39,286 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,364 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:08:39,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:39,366 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:08:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:39,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632758124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:39,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:39,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:08:39,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154672529] [2021-06-06 00:08:39,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:08:39,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:39,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:08:39,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:08:39,419 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:39,713 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-06 00:08:39,843 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-06 00:08:40,088 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-06-06 00:08:40,602 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-06 00:08:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:40,831 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-06-06 00:08:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:08:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:40,834 INFO L225 Difference]: With dead ends: 2549 [2021-06-06 00:08:40,835 INFO L226 Difference]: Without dead ends: 2534 [2021-06-06 00:08:40,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1611.0ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:08:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-06 00:08:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-06-06 00:08:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-06-06 00:08:40,858 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-06-06 00:08:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:40,858 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-06-06 00:08:40,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-06-06 00:08:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:40,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:40,860 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:41,061 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-06-06 00:08:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873767102] [2021-06-06 00:08:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:41,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:41,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873767102] [2021-06-06 00:08:41,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873767102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:41,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347295711] [2021-06-06 00:08:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:41,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:08:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:42,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,026 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:42,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:08:42,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:08:42,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,201 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-06 00:08:42,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,227 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:08:42,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,249 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:42,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:08:42,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,399 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-06 00:08:42,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:08:42,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,436 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:42,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:42,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,580 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:08:42,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,602 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:42,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:08:42,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:42,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:08:42,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:42,750 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-06 00:08:42,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:42,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:42,771 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-06-06 00:08:43,006 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-06 00:08:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:43,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347295711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:43,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:43,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:08:43,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95356064] [2021-06-06 00:08:43,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:43,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:43,111 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:43,845 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-06 00:08:44,039 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-06-06 00:08:44,352 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-06 00:08:44,736 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-06 00:08:44,982 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-06 00:08:45,263 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-06 00:08:45,590 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-06-06 00:08:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:45,662 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-06-06 00:08:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:08:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:45,665 INFO L225 Difference]: With dead ends: 2284 [2021-06-06 00:08:45,665 INFO L226 Difference]: Without dead ends: 2269 [2021-06-06 00:08:45,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2596.9ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:08:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-06 00:08:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-06-06 00:08:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-06-06 00:08:45,689 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-06-06 00:08:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:45,690 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-06-06 00:08:45,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-06-06 00:08:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:45,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:45,693 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:45,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:45,914 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-06-06 00:08:45,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:45,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084775861] [2021-06-06 00:08:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:46,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084775861] [2021-06-06 00:08:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084775861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936488068] [2021-06-06 00:08:46,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:46,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:08:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:46,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,496 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:46,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:46,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:46,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,518 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:46,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:46,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:08:46,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:46,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:08:46,565 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:08:46,579 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,588 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:08:46,588 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:08:46,598 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:08:46,612 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,623 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:46,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:08:46,625 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:46,653 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:46,661 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:46,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:46,667 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:46,744 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:08:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:46,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936488068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:46,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:46,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:08:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106904323] [2021-06-06 00:08:46,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:46,931 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:47,493 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-06 00:08:47,871 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-06 00:08:48,048 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-06 00:08:48,206 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-06 00:08:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:48,432 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-06-06 00:08:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:08:48,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:48,435 INFO L225 Difference]: With dead ends: 2064 [2021-06-06 00:08:48,435 INFO L226 Difference]: Without dead ends: 2049 [2021-06-06 00:08:48,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1641.6ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:08:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-06 00:08:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-06-06 00:08:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-06-06 00:08:48,456 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-06-06 00:08:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:48,456 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-06-06 00:08:48,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-06-06 00:08:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:48,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:48,459 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:48,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:48,659 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-06-06 00:08:48,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:48,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773234309] [2021-06-06 00:08:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:49,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:49,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773234309] [2021-06-06 00:08:49,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773234309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:49,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711631051] [2021-06-06 00:08:49,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:49,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:08:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:49,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:49,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:49,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:08:49,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:49,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:08:49,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:49,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:49,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:49,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:49,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:08:49,414 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:49,420 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:49,425 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:49,431 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:49,436 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:49,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:49,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:49,441 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:49,519 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:08:49,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:49,521 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:08:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711631051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:49,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:49,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:08:49,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150199762] [2021-06-06 00:08:49,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:08:49,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:08:49,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:08:49,573 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:50,288 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-06-06 00:08:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:08:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:50,291 INFO L225 Difference]: With dead ends: 2341 [2021-06-06 00:08:50,292 INFO L226 Difference]: Without dead ends: 2320 [2021-06-06 00:08:50,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 949.1ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:08:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-06 00:08:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-06-06 00:08:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-06-06 00:08:50,315 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-06-06 00:08:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:50,315 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-06-06 00:08:50,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-06-06 00:08:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:50,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:50,317 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:50,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-06-06 00:08:50,518 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-06-06 00:08:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:50,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564838280] [2021-06-06 00:08:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:50,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:50,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564838280] [2021-06-06 00:08:50,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564838280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:50,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950708735] [2021-06-06 00:08:50,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:50,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,229 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:51,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:08:51,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,255 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:08:51,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:51,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:51,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,307 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:51,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:51,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:08:51,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:08:51,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:08:51,365 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:08:51,379 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:08:51,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,405 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:51,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:51,407 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,418 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:51,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:51,420 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,430 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:51,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:08:51,432 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:51,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:51,438 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:51,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:51,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:51,531 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-06 00:08:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:51,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950708735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:51,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:51,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:08:51,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113105365] [2021-06-06 00:08:51,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:51,720 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:52,318 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-06 00:08:52,965 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-06 00:08:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:53,019 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-06-06 00:08:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:08:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:53,023 INFO L225 Difference]: With dead ends: 2236 [2021-06-06 00:08:53,023 INFO L226 Difference]: Without dead ends: 2207 [2021-06-06 00:08:53,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1523.4ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:08:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-06 00:08:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-06-06 00:08:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-06-06 00:08:53,042 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-06-06 00:08:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:53,042 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-06-06 00:08:53,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-06-06 00:08:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:53,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:53,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-06-06 00:08:53,245 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-06-06 00:08:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:53,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623970302] [2021-06-06 00:08:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:53,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:53,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623970302] [2021-06-06 00:08:53,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623970302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:53,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4478326] [2021-06-06 00:08:53,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:53,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:53,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:53,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,000 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:54,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:08:54,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,029 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:08:54,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,186 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:08:54,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:08:54,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,229 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:54,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:08:54,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,543 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-06 00:08:54,544 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-06-06 00:08:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:08:54,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,583 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:54,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:08:54,585 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,722 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-06 00:08:54,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:08:54,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,765 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:54,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:54,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:55,015 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-06 00:08:55,015 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-06-06 00:08:55,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:55,032 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-06-06 00:08:55,224 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-06 00:08:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4478326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:55,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:55,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:08:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064752581] [2021-06-06 00:08:55,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:55,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:55,322 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:56,028 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-06 00:08:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:56,251 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-06-06 00:08:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:08:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:56,254 INFO L225 Difference]: With dead ends: 2047 [2021-06-06 00:08:56,254 INFO L226 Difference]: Without dead ends: 2022 [2021-06-06 00:08:56,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1297.3ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:08:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-06 00:08:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-06-06 00:08:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-06-06 00:08:56,275 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-06-06 00:08:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:56,275 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-06-06 00:08:56,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-06-06 00:08:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:56,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:56,277 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:56,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:56,477 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-06-06 00:08:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:56,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520826248] [2021-06-06 00:08:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:56,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:56,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520826248] [2021-06-06 00:08:56,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520826248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:56,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623885851] [2021-06-06 00:08:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:56,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:08:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:57,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:57,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-06 00:08:57,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,169 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:57,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:08:57,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,182 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:57,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,195 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:57,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:57,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-06 00:08:57,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,224 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:57,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:57,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-06 00:08:57,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:57,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-06 00:08:57,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:57,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:57,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:08:57,301 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,316 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:08:57,317 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,329 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:57,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:57,330 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:57,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-06 00:08:57,345 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:57,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:57,354 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:57,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-06 00:08:57,356 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:57,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:57,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:57,434 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-06 00:08:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:57,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623885851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:57,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:57,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:08:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646312893] [2021-06-06 00:08:57,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:57,646 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:58,246 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-06 00:08:58,808 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-06 00:08:58,953 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-06 00:08:59,224 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:08:59,547 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-06 00:08:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:59,610 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-06-06 00:08:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:08:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:59,613 INFO L225 Difference]: With dead ends: 2419 [2021-06-06 00:08:59,613 INFO L226 Difference]: Without dead ends: 2400 [2021-06-06 00:08:59,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2226.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:08:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-06 00:08:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-06-06 00:08:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-06-06 00:08:59,635 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-06-06 00:08:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:59,635 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-06-06 00:08:59,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-06-06 00:08:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:59,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:59,637 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:59,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:59,838 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-06-06 00:08:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:59,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201616559] [2021-06-06 00:08:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:00,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201616559] [2021-06-06 00:09:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201616559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710057965] [2021-06-06 00:09:00,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:00,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:00,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:00,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:09:00,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:00,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:00,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:00,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:00,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:00,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:09:00,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:00,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-06 00:09:00,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:00,629 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:09:00,635 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:00,641 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:00,647 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:00,652 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:00,658 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:00,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:00,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:00,662 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:00,752 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-06 00:09:00,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:00,753 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-06 00:09:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710057965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:00,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:00,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:09:00,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692104949] [2021-06-06 00:09:00,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:09:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:09:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:09:00,808 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:01,358 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-06 00:09:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:01,676 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-06-06 00:09:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:09:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:01,679 INFO L225 Difference]: With dead ends: 2310 [2021-06-06 00:09:01,679 INFO L226 Difference]: Without dead ends: 2295 [2021-06-06 00:09:01,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1129.4ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:09:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-06 00:09:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-06-06 00:09:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-06-06 00:09:01,700 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-06-06 00:09:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:01,700 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-06-06 00:09:01,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-06-06 00:09:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:01,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:01,702 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:01,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-06-06 00:09:01,903 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-06-06 00:09:01,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:01,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809724013] [2021-06-06 00:09:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:02,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:02,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809724013] [2021-06-06 00:09:02,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809724013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:02,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051474080] [2021-06-06 00:09:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:02,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:09:02,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:09:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:02,597 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:02,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,616 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:02,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:09:02,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,627 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:02,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,636 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:02,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,655 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:02,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:02,657 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,666 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:09:02,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:02,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:09:02,687 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,708 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:09:02,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:02,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:09:02,729 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,751 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:02,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:09:02,752 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,761 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:02,762 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,771 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:09:02,772 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,792 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:02,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:09:02,796 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,806 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:02,807 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,816 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:02,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:02,817 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:02,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:09:02,832 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:02,948 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-06 00:09:02,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:02,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:02,961 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-06-06 00:09:03,193 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-06 00:09:03,414 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-06 00:09:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051474080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:09:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663588575] [2021-06-06 00:09:03,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:03,559 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:04,032 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-06 00:09:04,399 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-06 00:09:04,574 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-06-06 00:09:04,764 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-06 00:09:05,022 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-06-06 00:09:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:05,091 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-06-06 00:09:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:09:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:05,095 INFO L225 Difference]: With dead ends: 2570 [2021-06-06 00:09:05,095 INFO L226 Difference]: Without dead ends: 2555 [2021-06-06 00:09:05,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2158.8ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:09:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-06 00:09:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-06-06 00:09:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-06-06 00:09:05,118 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-06-06 00:09:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:05,119 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-06-06 00:09:05,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-06-06 00:09:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:05,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:05,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:05,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-06-06 00:09:05,321 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-06-06 00:09:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:05,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839793809] [2021-06-06 00:09:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:05,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:05,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839793809] [2021-06-06 00:09:05,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839793809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:05,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139840042] [2021-06-06 00:09:05,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:05,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:09:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:05,926 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-06-06 00:09:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:05,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:05,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:05,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:06,089 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-06 00:09:06,090 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-06-06 00:09:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:06,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:06,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:06,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:06,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:06,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:06,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:06,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:06,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:06,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:09:06,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:06,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:06,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:06,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:09:06,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:06,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:06,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:06,245 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-06-06 00:09:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:06,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139840042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:06,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:06,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:06,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165923736] [2021-06-06 00:09:06,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:06,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:06,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:06,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:06,307 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:07,028 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-06 00:09:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:07,172 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-06-06 00:09:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:09:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:07,176 INFO L225 Difference]: With dead ends: 2415 [2021-06-06 00:09:07,176 INFO L226 Difference]: Without dead ends: 2385 [2021-06-06 00:09:07,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:09:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-06 00:09:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-06-06 00:09:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-06-06 00:09:07,199 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-06-06 00:09:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:07,199 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-06-06 00:09:07,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-06-06 00:09:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:07,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:07,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:07,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-06-06 00:09:07,402 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-06-06 00:09:07,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:07,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034972131] [2021-06-06 00:09:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:07,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:07,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034972131] [2021-06-06 00:09:07,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034972131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:07,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807190915] [2021-06-06 00:09:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:07,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:07,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:08,028 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-06 00:09:08,179 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-06 00:09:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:08,380 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:08,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:09:08,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:08,420 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:09:08,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:08,587 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:09:08,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:08,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:08,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:08,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:09:08,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:08,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:08,631 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:09:08,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:08,785 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:09:08,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:08,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:08,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:08,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:09:08,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:08,827 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:08,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:09:08,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:09,121 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-06-06 00:09:09,121 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-06 00:09:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:09,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:09,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:09:09,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:09,160 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:09,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:09,162 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:09,416 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-06 00:09:09,416 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-06-06 00:09:09,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:09,432 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-06-06 00:09:09,629 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-06 00:09:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:09,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807190915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:09,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:09,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:09:09,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2161760] [2021-06-06 00:09:09,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:09:09,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:09:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:09:09,727 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:10,005 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-06-06 00:09:10,233 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-06 00:09:10,757 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-06 00:09:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:10,785 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-06-06 00:09:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:09:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:10,789 INFO L225 Difference]: With dead ends: 2425 [2021-06-06 00:09:10,789 INFO L226 Difference]: Without dead ends: 2410 [2021-06-06 00:09:10,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1697.5ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:09:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-06 00:09:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-06-06 00:09:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-06-06 00:09:10,814 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-06-06 00:09:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:10,814 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-06-06 00:09:10,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-06-06 00:09:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:10,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:10,817 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:11,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:11,017 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-06-06 00:09:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:11,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075233003] [2021-06-06 00:09:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:11,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075233003] [2021-06-06 00:09:11,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075233003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557092673] [2021-06-06 00:09:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:11,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:11,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:11,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:11,875 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:09:12,137 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-06 00:09:12,218 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-06-06 00:09:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:12,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:12,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:12,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:09:12,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:12,374 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-06 00:09:12,374 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-06-06 00:09:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:12,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:09:12,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:12,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:12,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:12,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:12,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:12,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:12,444 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:12,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:12,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:12,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:12,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:12,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:12,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:12,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:12,535 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-06-06 00:09:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:12,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557092673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:12,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:12,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:09:12,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756393992] [2021-06-06 00:09:12,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:09:12,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:09:12,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:09:12,593 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:13,444 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:09:13,697 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-06-06 00:09:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:13,805 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-06-06 00:09:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:09:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:13,809 INFO L225 Difference]: With dead ends: 2321 [2021-06-06 00:09:13,809 INFO L226 Difference]: Without dead ends: 2306 [2021-06-06 00:09:13,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1874.9ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:09:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-06 00:09:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-06-06 00:09:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-06-06 00:09:13,831 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-06-06 00:09:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:13,831 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-06-06 00:09:13,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-06-06 00:09:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:13,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:13,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:14,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-06-06 00:09:14,034 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:14,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-06-06 00:09:14,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:14,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195115145] [2021-06-06 00:09:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:14,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195115145] [2021-06-06 00:09:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195115145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376470544] [2021-06-06 00:09:14,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:14,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:14,787 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-06 00:09:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:14,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:14,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:14,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:14,967 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:09:14,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:14,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:14,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:09:14,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,115 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:09:15,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:15,129 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:15,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,239 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-06 00:09:15,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:15,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:15,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,361 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:09:15,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:15,373 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:15,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:09:15,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,476 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:09:15,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:15,487 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:15,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:15,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:15,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:15,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:15,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:15,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:15,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:15,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:15,810 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:09:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:16,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376470544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:16,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:16,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:09:16,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033202513] [2021-06-06 00:09:16,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:09:16,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:09:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:09:16,002 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:16,755 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:09:17,115 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-06 00:09:17,440 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-06 00:09:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:17,629 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-06-06 00:09:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:09:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:17,633 INFO L225 Difference]: With dead ends: 2617 [2021-06-06 00:09:17,633 INFO L226 Difference]: Without dead ends: 2602 [2021-06-06 00:09:17,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2035.3ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:09:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-06 00:09:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-06-06 00:09:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-06-06 00:09:17,658 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-06-06 00:09:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:17,658 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-06-06 00:09:17,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-06-06 00:09:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:17,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:17,661 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:17,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:17,863 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-06-06 00:09:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375743308] [2021-06-06 00:09:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:18,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375743308] [2021-06-06 00:09:18,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375743308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136796212] [2021-06-06 00:09:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:18,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:09:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:18,593 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-06 00:09:18,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:18,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:18,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:18,720 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:18,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:18,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:18,853 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:09:18,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:18,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:09:18,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:18,878 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:18,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:18,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,004 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:09:19,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:19,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,032 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:09:19,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,143 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:09:19,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:19,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:19,169 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,271 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-06 00:09:19,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:19,278 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-06-06 00:09:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:19,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136796212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:19,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:19,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:09:19,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883314421] [2021-06-06 00:09:19,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:19,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:19,470 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:20,443 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-06-06 00:09:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:09:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:20,447 INFO L225 Difference]: With dead ends: 2461 [2021-06-06 00:09:20,447 INFO L226 Difference]: Without dead ends: 2436 [2021-06-06 00:09:20,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1373.1ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:09:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-06 00:09:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-06-06 00:09:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-06-06 00:09:20,471 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-06-06 00:09:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:20,472 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-06-06 00:09:20,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-06-06 00:09:20,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:20,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:20,474 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:20,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-06-06 00:09:20,675 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-06-06 00:09:20,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:20,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838693508] [2021-06-06 00:09:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:21,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:21,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838693508] [2021-06-06 00:09:21,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838693508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:21,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221080324] [2021-06-06 00:09:21,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:21,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:09:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:21,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:21,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,286 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:21,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:21,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,296 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:21,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,309 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:21,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:21,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:21,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:21,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:21,332 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:21,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:09:21,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:21,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:21,360 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:09:21,370 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,379 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:09:21,380 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:21,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:21,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,406 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:09:21,407 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:21,422 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:21,431 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:21,437 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:21,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:21,438 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:21,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:21,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:21,513 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:09:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221080324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:21,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:21,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:21,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837727705] [2021-06-06 00:09:21,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:21,733 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:22,474 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-06 00:09:22,658 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-06 00:09:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:22,721 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-06-06 00:09:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:09:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:22,724 INFO L225 Difference]: With dead ends: 2412 [2021-06-06 00:09:22,725 INFO L226 Difference]: Without dead ends: 2397 [2021-06-06 00:09:22,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1325.7ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:09:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-06-06 00:09:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-06-06 00:09:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-06-06 00:09:22,747 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-06-06 00:09:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:22,747 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-06-06 00:09:22,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-06-06 00:09:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:22,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:22,749 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:22,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:22,950 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-06-06 00:09:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:22,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273417688] [2021-06-06 00:09:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:23,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:23,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273417688] [2021-06-06 00:09:23,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273417688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:23,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378736616] [2021-06-06 00:09:23,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:23,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:09:23,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:23,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:09:23,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:09:23,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:09:23,912 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:23,919 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:23,927 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:09:23,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:09:23,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:09:23,949 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:09:23,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:23,963 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:23,970 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:23,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:09:23,974 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:24,000 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:09:24,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:24,001 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:09:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:24,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378736616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:24,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:24,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:09:24,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216531296] [2021-06-06 00:09:24,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:09:24,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:09:24,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:09:24,031 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:24,776 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-06-06 00:09:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:09:24,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:24,779 INFO L225 Difference]: With dead ends: 2181 [2021-06-06 00:09:24,779 INFO L226 Difference]: Without dead ends: 2144 [2021-06-06 00:09:24,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1035.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:09:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-06 00:09:24,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-06-06 00:09:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-06-06 00:09:24,802 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-06-06 00:09:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:24,802 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-06-06 00:09:24,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-06-06 00:09:24,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:24,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:24,804 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:25,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-06-06 00:09:25,005 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-06-06 00:09:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:25,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814857750] [2021-06-06 00:09:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:25,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:25,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814857750] [2021-06-06 00:09:25,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814857750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:25,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34428548] [2021-06-06 00:09:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:25,614 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-06 00:09:25,664 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-06-06 00:09:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-06 00:09:25,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:09:25,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,785 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-06 00:09:25,786 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-06-06 00:09:25,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:09:25,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:09:25,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:25,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:09:25,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:25,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:25,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:09:25,900 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-06-06 00:09:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34428548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:09:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729034582] [2021-06-06 00:09:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:09:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:09:25,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:09:25,961 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:26,929 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-06 00:09:27,077 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-06 00:09:27,216 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-06 00:09:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:27,338 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-06-06 00:09:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:09:27,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:27,342 INFO L225 Difference]: With dead ends: 2358 [2021-06-06 00:09:27,342 INFO L226 Difference]: Without dead ends: 2312 [2021-06-06 00:09:27,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1500.8ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:09:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-06-06 00:09:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-06-06 00:09:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-06-06 00:09:27,364 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-06-06 00:09:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:27,364 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-06-06 00:09:27,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-06-06 00:09:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:27,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:27,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:27,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-06-06 00:09:27,567 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-06-06 00:09:27,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:27,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308427046] [2021-06-06 00:09:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:27,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308427046] [2021-06-06 00:09:27,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308427046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234693918] [2021-06-06 00:09:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:27,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:27,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:09:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:28,426 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:09:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:28,720 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:09:28,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-06 00:09:28,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:28,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:28,753 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-06 00:09:28,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:29,150 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-06 00:09:29,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,189 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:29,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-06 00:09:29,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,220 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:09:29,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-06 00:09:29,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:29,572 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-06 00:09:29,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,606 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:09:29,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-06 00:09:29,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:29,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,646 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-06 00:09:29,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-06 00:09:29,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:29,982 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-06 00:09:29,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:29,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,013 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:09:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-06 00:09:30,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:30,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-06 00:09:30,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,360 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:09:30,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,396 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:30,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-06 00:09:30,398 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:30,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-06 00:09:30,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,004 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-06-06 00:09:31,004 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-06-06 00:09:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,035 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:09:31,039 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,052 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:31,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:31,052 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,295 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:09:31,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,328 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:31,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-06 00:09:31,331 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,352 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:09:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-06 00:09:31,354 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,581 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:09:31,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,612 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:31,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:09:31,616 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,629 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:31,630 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,814 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-06 00:09:31,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:31,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-06 00:09:31,826 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-06-06 00:09:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234693918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:31,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:31,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:31,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711465991] [2021-06-06 00:09:31,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:09:31,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:09:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:09:31,992 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:33,056 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-06 00:09:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:33,360 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-06-06 00:09:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:09:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:33,363 INFO L225 Difference]: With dead ends: 2168 [2021-06-06 00:09:33,363 INFO L226 Difference]: Without dead ends: 2153 [2021-06-06 00:09:33,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1699.6ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:09:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-06-06 00:09:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-06-06 00:09:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-06-06 00:09:33,382 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-06-06 00:09:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:33,382 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-06-06 00:09:33,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-06-06 00:09:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:33,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:33,385 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:33,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:33,585 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-06-06 00:09:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:33,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689186347] [2021-06-06 00:09:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:34,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689186347] [2021-06-06 00:09:34,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689186347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674507171] [2021-06-06 00:09:34,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:34,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:34,325 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-06 00:09:34,541 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-06 00:09:34,908 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-06-06 00:09:34,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:34,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:34,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:34,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:34,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:34,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:35,097 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-06 00:09:35,098 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-06-06 00:09:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:35,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:35,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:35,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:35,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:35,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:35,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:35,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:35,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:35,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:35,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:35,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:35,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:35,220 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-06-06 00:09:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674507171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:35,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:35,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:35,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913038753] [2021-06-06 00:09:35,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:35,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:35,279 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:35,969 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-06 00:09:36,630 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-06-06 00:09:37,082 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-06 00:09:37,599 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-06-06 00:09:38,198 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-06-06 00:09:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:38,427 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-06-06 00:09:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:09:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:38,431 INFO L225 Difference]: With dead ends: 2468 [2021-06-06 00:09:38,431 INFO L226 Difference]: Without dead ends: 2453 [2021-06-06 00:09:38,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3651.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:09:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-06 00:09:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-06-06 00:09:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-06-06 00:09:38,463 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-06-06 00:09:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:38,464 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-06-06 00:09:38,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-06-06 00:09:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:38,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:38,466 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:38,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-06 00:09:38,666 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-06-06 00:09:38,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:38,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195477182] [2021-06-06 00:09:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:38,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195477182] [2021-06-06 00:09:38,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195477182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101470385] [2021-06-06 00:09:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:38,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:09:38,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:39,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:39,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:09:39,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:09:39,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:09:39,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:39,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:39,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:09:39,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:09:39,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:09:39,594 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:39,602 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:09:39,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:39,617 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:09:39,625 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:09:39,632 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:39,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:39,637 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:39,662 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:09:39,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:39,664 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:09:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:39,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101470385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:39,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:39,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:09:39,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478645980] [2021-06-06 00:09:39,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:09:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:09:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:09:39,682 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:40,063 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-06 00:09:40,295 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-06 00:09:40,533 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-06 00:09:40,852 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-06 00:09:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:41,148 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-06-06 00:09:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:09:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:41,151 INFO L225 Difference]: With dead ends: 2505 [2021-06-06 00:09:41,151 INFO L226 Difference]: Without dead ends: 2483 [2021-06-06 00:09:41,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1552.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:09:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-06-06 00:09:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-06-06 00:09:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-06-06 00:09:41,186 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-06-06 00:09:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:41,186 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-06-06 00:09:41,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-06-06 00:09:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:41,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:41,189 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:41,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:41,389 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:41,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-06-06 00:09:41,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:41,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73347468] [2021-06-06 00:09:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:41,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:41,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73347468] [2021-06-06 00:09:41,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73347468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:41,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462061880] [2021-06-06 00:09:41,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:41,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:09:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:42,330 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:09:42,644 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:09:42,822 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-06-06 00:09:42,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:42,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:09:42,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:43,260 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-06-06 00:09:43,261 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-06-06 00:09:43,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:43,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:09:43,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:43,438 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:09:43,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:43,462 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:43,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:09:43,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:43,620 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:09:43,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:43,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:43,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-06 00:09:43,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:43,793 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:09:43,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:43,818 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:09:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-06 00:09:43,822 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:43,967 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:09:43,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:43,988 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:09:43,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-06 00:09:43,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:44,136 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-06 00:09:44,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:44,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:44,173 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:09:44,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 30 [2021-06-06 00:09:44,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:44,313 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-06 00:09:44,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:44,332 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:09:44,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:09:44,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:44,467 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-06 00:09:44,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:44,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:44,480 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-06-06 00:09:44,728 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-06 00:09:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:44,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462061880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:44,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:44,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:09:44,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836370205] [2021-06-06 00:09:44,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:44,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:44,854 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:45,429 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-06 00:09:45,804 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-06-06 00:09:46,364 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-06 00:09:46,635 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-06 00:09:47,386 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-06-06 00:09:48,233 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-06-06 00:09:49,085 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-06-06 00:09:49,670 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-06-06 00:09:50,624 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-06 00:09:51,141 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-06-06 00:09:51,815 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-06-06 00:09:52,066 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-06 00:09:52,286 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-06-06 00:09:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:52,565 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-06-06 00:09:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:09:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:52,569 INFO L225 Difference]: With dead ends: 2657 [2021-06-06 00:09:52,569 INFO L226 Difference]: Without dead ends: 2642 [2021-06-06 00:09:52,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 7879.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:09:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-06 00:09:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-06-06 00:09:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-06-06 00:09:52,593 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-06-06 00:09:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:52,593 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-06-06 00:09:52,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-06-06 00:09:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:52,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:52,595 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:52,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:52,797 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-06-06 00:09:52,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:52,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547727080] [2021-06-06 00:09:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:53,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:53,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547727080] [2021-06-06 00:09:53,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547727080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:53,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841176811] [2021-06-06 00:09:53,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:53,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:53,474 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:09:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:53,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,652 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:09:53,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,665 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:09:53,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,780 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-06 00:09:53,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:53,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:53,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,905 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:09:53,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,918 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:53,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:53,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:54,021 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-06 00:09:54,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:54,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:09:54,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:54,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:54,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:54,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:54,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:54,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:09:54,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:54,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:54,367 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:54,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:54,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:54,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:54,469 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-06 00:09:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:54,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841176811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:54,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:54,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:54,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194253451] [2021-06-06 00:09:54,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:54,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:54,658 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:55,741 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-06 00:09:56,036 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-06 00:09:56,174 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-06 00:09:56,509 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-06 00:09:56,763 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-06 00:09:56,968 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-06 00:09:57,161 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-06 00:09:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:57,259 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-06-06 00:09:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:09:57,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:57,263 INFO L225 Difference]: With dead ends: 2972 [2021-06-06 00:09:57,263 INFO L226 Difference]: Without dead ends: 2942 [2021-06-06 00:09:57,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2850.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:09:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-06 00:09:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-06-06 00:09:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-06-06 00:09:57,290 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-06-06 00:09:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:57,291 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-06-06 00:09:57,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-06-06 00:09:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:57,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:57,293 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:57,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-06 00:09:57,493 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-06-06 00:09:57,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:57,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597149830] [2021-06-06 00:09:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:57,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:57,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597149830] [2021-06-06 00:09:57,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597149830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:57,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453811218] [2021-06-06 00:09:57,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:57,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:09:57,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:57,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:57,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:09:58,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:09:58,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:09:58,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:58,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:09:58,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:09:58,384 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:58,393 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:58,402 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:58,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:09:58,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:58,428 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:09:58,436 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:58,444 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:09:58,452 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:58,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:58,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:09:58,457 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:58,484 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:09:58,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:58,485 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:09:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:58,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453811218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:58,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:58,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:09:58,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899344593] [2021-06-06 00:09:58,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:58,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:58,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:58,520 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:59,841 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-06-06 00:09:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:09:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:59,845 INFO L225 Difference]: With dead ends: 3403 [2021-06-06 00:09:59,846 INFO L226 Difference]: Without dead ends: 3373 [2021-06-06 00:09:59,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1376.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:09:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-06-06 00:09:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-06-06 00:09:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-06-06 00:09:59,879 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-06-06 00:09:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:59,879 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-06-06 00:09:59,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-06-06 00:09:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:59,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:59,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:00,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:00,082 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-06-06 00:10:00,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:00,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571479366] [2021-06-06 00:10:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:00,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:00,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571479366] [2021-06-06 00:10:00,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571479366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:00,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766750727] [2021-06-06 00:10:00,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:00,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:10:00,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,967 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-06 00:10:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-06-06 00:10:00,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:01,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-06-06 00:10:01,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,047 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-06 00:10:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-06-06 00:10:01,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,071 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:01,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,102 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-06 00:10:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-06-06 00:10:01,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,122 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:10:01,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:01,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-06 00:10:01,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,182 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:10:01,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,218 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-06 00:10:01,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-06-06 00:10:01,222 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,241 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:10:01,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,272 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-06 00:10:01,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-06-06 00:10:01,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,302 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-06 00:10:01,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-06-06 00:10:01,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,323 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-06-06 00:10:01,324 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,343 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:01,343 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,361 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:10:01,362 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:01,375 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:10:01,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:10:01,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:01,624 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-06-06 00:10:01,625 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-06-06 00:10:01,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:10:01,629 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-06-06 00:10:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:01,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766750727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:01,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:01,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:10:01,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450059398] [2021-06-06 00:10:01,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:01,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:01,872 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:03,238 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-06-06 00:10:03,643 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-06 00:10:03,929 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-06 00:10:04,286 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-06 00:10:04,463 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-06 00:10:04,773 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-06 00:10:04,946 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-06 00:10:05,154 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-06 00:10:05,281 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-06 00:10:05,534 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-06 00:10:05,698 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-06-06 00:10:05,879 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-06 00:10:06,179 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-06-06 00:10:06,350 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-06 00:10:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:06,532 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-06-06 00:10:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:10:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:06,537 INFO L225 Difference]: With dead ends: 3293 [2021-06-06 00:10:06,537 INFO L226 Difference]: Without dead ends: 3220 [2021-06-06 00:10:06,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4609.6ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:10:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-06 00:10:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-06-06 00:10:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-06-06 00:10:06,566 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-06-06 00:10:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:06,566 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-06-06 00:10:06,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-06-06 00:10:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:06,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:06,568 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:06,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-06-06 00:10:06,773 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-06-06 00:10:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:06,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380557628] [2021-06-06 00:10:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:07,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:07,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380557628] [2021-06-06 00:10:07,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380557628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:07,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989416398] [2021-06-06 00:10:07,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:07,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:07,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:07,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:07,625 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:10:07,746 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-06-06 00:10:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:07,788 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:10:07,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:08,178 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-06-06 00:10:08,178 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-06-06 00:10:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:08,206 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:08,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:10:08,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:08,355 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-06 00:10:08,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:08,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:08,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:08,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:10:08,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:08,676 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-06-06 00:10:08,676 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-06-06 00:10:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:08,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:08,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:10:08,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:08,981 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-06-06 00:10:08,982 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-06-06 00:10:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:09,003 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:10:09,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:09,144 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-06 00:10:09,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:09,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:09,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:10:09,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:09,310 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:10:09,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:09,332 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:09,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:10:09,336 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:09,458 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:10:09,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:09,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:09,478 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:09,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:09,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:09,599 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:10:09,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:09,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:09,617 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-06-06 00:10:09,837 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-06 00:10:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:09,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989416398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:09,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:09,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:10:09,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196089940] [2021-06-06 00:10:09,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:09,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:09,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:09,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:09,941 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:11,210 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-06 00:10:11,334 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-06 00:10:11,757 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-06 00:10:11,978 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:10:12,363 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-06 00:10:12,686 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-06-06 00:10:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:12,742 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-06-06 00:10:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:10:12,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:12,747 INFO L225 Difference]: With dead ends: 2966 [2021-06-06 00:10:12,747 INFO L226 Difference]: Without dead ends: 2951 [2021-06-06 00:10:12,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3260.7ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:10:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-06 00:10:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-06-06 00:10:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-06-06 00:10:12,773 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-06-06 00:10:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:12,773 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-06-06 00:10:12,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-06-06 00:10:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:12,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:12,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:12,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:12,976 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-06-06 00:10:12,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:12,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081130156] [2021-06-06 00:10:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:13,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:13,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081130156] [2021-06-06 00:10:13,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081130156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:13,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058465235] [2021-06-06 00:10:13,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:13,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:10:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:10:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:13,888 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-06 00:10:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:13,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:13,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:10:14,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,013 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:14,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:14,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,147 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-06 00:10:14,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:14,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:14,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,312 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-06 00:10:14,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:10:14,327 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:14,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:14,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,452 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-06 00:10:14,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:14,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:10:14,466 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:14,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:14,478 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:14,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:14,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:14,584 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-06-06 00:10:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058465235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:14,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:14,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:10:14,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353293177] [2021-06-06 00:10:14,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:14,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:14,780 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:15,336 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-06 00:10:15,553 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-06 00:10:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:16,018 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-06-06 00:10:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:10:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:16,022 INFO L225 Difference]: With dead ends: 2612 [2021-06-06 00:10:16,022 INFO L226 Difference]: Without dead ends: 2587 [2021-06-06 00:10:16,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1780.5ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:10:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-06-06 00:10:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-06-06 00:10:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-06-06 00:10:16,060 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-06-06 00:10:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:16,060 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-06-06 00:10:16,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-06-06 00:10:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:16,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:16,063 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:16,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3519 [2021-06-06 00:10:16,263 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-06-06 00:10:16,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:16,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904412624] [2021-06-06 00:10:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:16,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:16,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904412624] [2021-06-06 00:10:16,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904412624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:16,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129270178] [2021-06-06 00:10:16,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:16,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:10:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:16,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:16,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:16,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:16,978 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:16,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:16,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:16,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:16,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:16,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,001 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:17,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:17,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,014 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:17,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:17,028 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,037 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:17,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:17,038 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:10:17,050 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:17,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:10:17,065 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:10:17,074 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,084 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:17,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:10:17,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:17,098 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:10:17,111 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:17,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:17,126 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,134 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:10:17,135 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:17,140 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:17,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:10:17,141 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:17,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:17,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:17,217 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:10:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:17,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129270178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:17,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:17,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:10:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537454381] [2021-06-06 00:10:17,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:17,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:17,411 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:17,805 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-06 00:10:18,850 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-06 00:10:19,124 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-06 00:10:19,307 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-06 00:10:19,594 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:10:19,942 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-06 00:10:20,251 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-06-06 00:10:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:20,314 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-06-06 00:10:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:10:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:20,318 INFO L225 Difference]: With dead ends: 2664 [2021-06-06 00:10:20,319 INFO L226 Difference]: Without dead ends: 2649 [2021-06-06 00:10:20,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3003.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:10:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-06 00:10:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-06-06 00:10:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-06-06 00:10:20,345 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-06-06 00:10:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:20,345 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-06-06 00:10:20,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-06-06 00:10:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:20,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:20,347 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:20,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:20,548 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-06-06 00:10:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:20,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777603678] [2021-06-06 00:10:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:20,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777603678] [2021-06-06 00:10:20,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777603678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112657434] [2021-06-06 00:10:20,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:20,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:20,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:21,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:10:21,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:10:21,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:10:21,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:10:21,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:10:21,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:10:21,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:10:21,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:10:21,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:10:21,494 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:10:21,503 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:10:21,511 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:10:21,519 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:10:21,527 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:10:21,535 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:10:21,539 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,566 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:10:21,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:10:21,567 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:10:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:21,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112657434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:21,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:21,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:10:21,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122496555] [2021-06-06 00:10:21,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:10:21,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:10:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:21,586 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:24,031 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-06-06 00:10:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:10:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:24,035 INFO L225 Difference]: With dead ends: 2625 [2021-06-06 00:10:24,035 INFO L226 Difference]: Without dead ends: 2603 [2021-06-06 00:10:24,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2420.7ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:10:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-06 00:10:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-06-06 00:10:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-06-06 00:10:24,080 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-06-06 00:10:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:24,080 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-06-06 00:10:24,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-06-06 00:10:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:24,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:24,082 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:24,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-06-06 00:10:24,283 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-06-06 00:10:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:24,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522194825] [2021-06-06 00:10:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:24,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:24,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522194825] [2021-06-06 00:10:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522194825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:24,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906639831] [2021-06-06 00:10:24,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:10:24,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:24,908 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-06 00:10:24,958 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-06-06 00:10:24,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:24,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:24,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:24,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:10:24,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:24,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-06 00:10:24,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,086 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-06 00:10:25,087 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-06-06 00:10:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:10:25,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:25,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:10:25,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:25,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:25,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:10:25,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:10:25,210 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-06-06 00:10:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:25,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906639831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:25,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:25,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:10:25,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082295842] [2021-06-06 00:10:25,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:25,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:25,260 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:26,669 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-06 00:10:26,924 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-06 00:10:27,073 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-06 00:10:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:27,185 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-06-06 00:10:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:10:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:27,189 INFO L225 Difference]: With dead ends: 2959 [2021-06-06 00:10:27,189 INFO L226 Difference]: Without dead ends: 2919 [2021-06-06 00:10:27,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2028.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:10:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-06-06 00:10:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-06-06 00:10:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-06-06 00:10:27,217 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-06-06 00:10:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:27,218 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-06-06 00:10:27,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-06-06 00:10:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:27,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:27,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3660 [2021-06-06 00:10:27,420 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-06-06 00:10:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:27,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737444189] [2021-06-06 00:10:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:27,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737444189] [2021-06-06 00:10:27,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737444189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:27,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745798192] [2021-06-06 00:10:27,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:27,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:10:27,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:27,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:28,148 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-06 00:10:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-06-06 00:10:28,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,404 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-06 00:10:28,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-06-06 00:10:28,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:29,606 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-06-06 00:10:29,607 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-06-06 00:10:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:29,668 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-06-06 00:10:29,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-06-06 00:10:29,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:29,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:29,728 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-06 00:10:29,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-06-06 00:10:29,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:30,943 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-06-06 00:10:30,944 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-06-06 00:10:30,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:30,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:30,992 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-06 00:10:30,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:10:30,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,037 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-06 00:10:31,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:10:31,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:32,128 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-06-06 00:10:32,128 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-06-06 00:10:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,174 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-06-06 00:10:32,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:10:32,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:32,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,214 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-06-06 00:10:32,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:10:32,215 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:32,714 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-06 00:10:32,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,765 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-06 00:10:32,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-06-06 00:10:32,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:32,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:32,812 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-06 00:10:32,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-06-06 00:10:32,817 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,756 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-06-06 00:10:33,756 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-06-06 00:10:33,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,810 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-06 00:10:33,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-06-06 00:10:33,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:33,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:33,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-06 00:10:33,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,293 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-06 00:10:34,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,338 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-06 00:10:34,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:10:34,341 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,378 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-06 00:10:34,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:10:34,380 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:35,211 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-06-06 00:10:35,211 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-06-06 00:10:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:35,265 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-06-06 00:10:35,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-06-06 00:10:35,269 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:35,308 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-06 00:10:35,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-06-06 00:10:35,312 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:35,710 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:10:35,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:35,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-06 00:10:35,765 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-06-06 00:10:36,236 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-06-06 00:10:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:36,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745798192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:36,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:36,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:10:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835799059] [2021-06-06 00:10:36,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:36,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:36,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:36,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:36,354 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:37,015 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-06-06 00:10:37,262 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-06-06 00:10:37,693 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-06-06 00:10:38,217 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-06 00:10:38,395 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-06-06 00:10:38,734 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-06-06 00:10:39,199 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-06 00:10:39,434 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-06 00:10:39,637 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-06-06 00:10:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:39,722 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-06-06 00:10:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:10:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:39,727 INFO L225 Difference]: With dead ends: 2842 [2021-06-06 00:10:39,727 INFO L226 Difference]: Without dead ends: 2798 [2021-06-06 00:10:39,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3873.6ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:10:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-06-06 00:10:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-06-06 00:10:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-06-06 00:10:39,756 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-06-06 00:10:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:39,756 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-06-06 00:10:39,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-06-06 00:10:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:39,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:39,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:39,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:39,959 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-06-06 00:10:39,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:39,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483980249] [2021-06-06 00:10:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:40,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:40,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483980249] [2021-06-06 00:10:40,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483980249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:40,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547874607] [2021-06-06 00:10:40,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:40,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:40,800 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-06 00:10:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:40,922 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:40,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:10:40,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:40,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:40,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-06 00:10:40,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,294 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-06-06 00:10:41,294 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-06-06 00:10:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,322 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:10:41,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,464 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-06 00:10:41,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,487 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:41,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-06 00:10:41,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,635 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-06 00:10:41,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,661 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:41,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-06 00:10:41,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,804 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-06 00:10:41,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,828 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:41,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-06 00:10:41,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,966 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-06 00:10:41,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:41,987 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:41,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,116 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-06 00:10:42,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:10:42,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,383 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-06 00:10:42,384 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-06-06 00:10:42,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:42,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:42,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-06 00:10:42,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,645 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-06-06 00:10:42,645 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-06-06 00:10:42,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:42,662 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-06-06 00:10:42,855 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-06 00:10:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:42,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547874607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:42,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:42,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:10:42,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283264637] [2021-06-06 00:10:42,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:42,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:42,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:42,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:42,956 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:44,109 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-06 00:10:44,336 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-06 00:10:44,556 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-06 00:10:44,981 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-06 00:10:45,346 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-06 00:10:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:45,410 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-06-06 00:10:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:10:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:45,415 INFO L225 Difference]: With dead ends: 3051 [2021-06-06 00:10:45,415 INFO L226 Difference]: Without dead ends: 3036 [2021-06-06 00:10:45,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2897.0ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:10:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-06-06 00:10:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-06-06 00:10:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-06-06 00:10:45,443 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-06-06 00:10:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:45,443 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-06-06 00:10:45,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-06-06 00:10:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:45,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:45,446 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:45,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-06 00:10:45,646 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-06-06 00:10:45,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:45,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951247780] [2021-06-06 00:10:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:46,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:46,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951247780] [2021-06-06 00:10:46,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951247780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:46,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672706123] [2021-06-06 00:10:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:46,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:10:46,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:46,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:46,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,321 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:46,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:46,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:46,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,344 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:46,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:46,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:46,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:46,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:46,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:46,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:10:46,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:46,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:10:46,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:10:46,402 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-06 00:10:46,411 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:46,425 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:46,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:10:46,438 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:46,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:46,451 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:10:46,461 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:46,470 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:10:46,471 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:46,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:46,547 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-06 00:10:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:46,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672706123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:46,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:46,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:10:46,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208143308] [2021-06-06 00:10:46,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:46,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:46,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:46,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:46,767 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:47,072 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-06 00:10:47,942 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-06 00:10:48,126 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-06 00:10:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:48,210 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-06-06 00:10:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:10:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:48,215 INFO L225 Difference]: With dead ends: 2900 [2021-06-06 00:10:48,215 INFO L226 Difference]: Without dead ends: 2875 [2021-06-06 00:10:48,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1684.9ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:10:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-06-06 00:10:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-06-06 00:10:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-06-06 00:10:48,241 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-06-06 00:10:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:48,241 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-06-06 00:10:48,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-06-06 00:10:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:48,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:48,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:48,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3800,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:48,445 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-06-06 00:10:48,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:48,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967545185] [2021-06-06 00:10:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:48,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:48,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967545185] [2021-06-06 00:10:48,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967545185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:48,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29464941] [2021-06-06 00:10:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:48,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:10:48,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:48,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:10:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:49,411 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-06 00:10:49,750 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-06-06 00:10:49,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:49,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:49,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:49,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:49,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:49,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:50,079 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-06 00:10:50,080 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-06-06 00:10:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:50,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:10:50,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:50,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:50,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:50,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:50,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:10:50,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:50,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:50,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:50,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:10:50,166 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:50,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:10:50,223 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:50,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:50,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:10:50,275 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-06-06 00:10:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:50,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29464941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:50,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:50,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:10:50,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294912782] [2021-06-06 00:10:50,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:50,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:50,330 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:51,103 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-06 00:10:51,475 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-06 00:10:51,924 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-06-06 00:10:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:52,055 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-06-06 00:10:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:10:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:52,058 INFO L225 Difference]: With dead ends: 2671 [2021-06-06 00:10:52,058 INFO L226 Difference]: Without dead ends: 2656 [2021-06-06 00:10:52,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2331.8ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:10:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-06 00:10:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-06-06 00:10:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-06-06 00:10:52,082 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-06-06 00:10:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:52,082 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-06-06 00:10:52,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-06-06 00:10:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:52,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:52,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:52,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3817,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:52,289 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-06 00:10:52,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:52,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980420600] [2021-06-06 00:10:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:52,493 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-06 00:10:52,635 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-06 00:10:52,829 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-06 00:10:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:52,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:52,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980420600] [2021-06-06 00:10:52,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980420600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:52,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180210618] [2021-06-06 00:10:52,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:52,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:10:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:53,334 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-06 00:10:53,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,452 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:53,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:10:53,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:53,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,596 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:10:53,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,610 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:53,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:10:53,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,740 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:10:53,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,753 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:53,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:53,755 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:10:53,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,876 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:10:53,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:53,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:53,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:53,904 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,004 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-06 00:10:54,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:54,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:54,011 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-06-06 00:10:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:54,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180210618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:54,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:54,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:10:54,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155754556] [2021-06-06 00:10:54,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:54,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:54,202 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:55,285 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-06-06 00:10:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:10:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:55,289 INFO L225 Difference]: With dead ends: 2740 [2021-06-06 00:10:55,289 INFO L226 Difference]: Without dead ends: 2725 [2021-06-06 00:10:55,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1677.7ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:10:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-06 00:10:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-06-06 00:10:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-06-06 00:10:55,314 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-06-06 00:10:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:55,314 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-06-06 00:10:55,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-06-06 00:10:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:55,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:55,316 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:55,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3836 [2021-06-06 00:10:55,517 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-06-06 00:10:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:55,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726383064] [2021-06-06 00:10:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:55,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726383064] [2021-06-06 00:10:55,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726383064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384525292] [2021-06-06 00:10:55,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:55,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:55,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:56,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:10:56,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:10:56,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:10:56,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:10:56,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:10:56,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:10:56,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:10:56,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:10:56,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:10:56,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:10:56,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:10:56,398 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-06 00:10:56,406 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:10:56,413 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:10:56,420 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:56,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:56,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:10:56,425 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:56,451 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-06 00:10:56,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:10:56,452 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-06 00:10:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384525292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:56,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:56,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:10:56,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363994433] [2021-06-06 00:10:56,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:56,488 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:57,978 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-06-06 00:10:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:10:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:57,982 INFO L225 Difference]: With dead ends: 2992 [2021-06-06 00:10:57,982 INFO L226 Difference]: Without dead ends: 2955 [2021-06-06 00:10:57,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1529.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:10:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-06-06 00:10:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-06-06 00:10:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-06-06 00:10:58,008 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-06-06 00:10:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:58,009 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-06-06 00:10:58,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-06-06 00:10:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:10:58,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:58,011 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:58,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3869,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:58,211 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-06 00:10:58,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:58,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803699997] [2021-06-06 00:10:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:58,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:58,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803699997] [2021-06-06 00:10:58,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803699997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:58,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562804679] [2021-06-06 00:10:58,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:58,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:10:58,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:10:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:58,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562804679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:58,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:58,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:10:58,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388602303] [2021-06-06 00:10:58,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:10:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:10:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:10:58,380 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:59,307 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-06-06 00:10:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:10:59,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:10:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:59,329 INFO L225 Difference]: With dead ends: 5069 [2021-06-06 00:10:59,329 INFO L226 Difference]: Without dead ends: 5069 [2021-06-06 00:10:59,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:10:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-06 00:10:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-06-06 00:10:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-06-06 00:10:59,367 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-06-06 00:10:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:59,367 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-06-06 00:10:59,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:59,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-06-06 00:10:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:10:59,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:59,370 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:59,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-06 00:10:59,570 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-06 00:10:59,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:59,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096450605] [2021-06-06 00:10:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:59,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:59,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096450605] [2021-06-06 00:10:59,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096450605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:59,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128662272] [2021-06-06 00:10:59,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:59,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:10:59,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:10:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:59,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128662272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:59,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:59,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:10:59,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941179650] [2021-06-06 00:10:59,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:10:59,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:10:59,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:10:59,749 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:01,047 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-06-06 00:11:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:11:01,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:01,054 INFO L225 Difference]: With dead ends: 6700 [2021-06-06 00:11:01,054 INFO L226 Difference]: Without dead ends: 6700 [2021-06-06 00:11:01,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 761.8ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:11:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-06-06 00:11:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-06-06 00:11:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-06-06 00:11:01,107 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-06-06 00:11:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:01,107 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-06-06 00:11:01,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-06-06 00:11:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:01,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:01,110 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:01,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:01,313 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-06 00:11:01,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:01,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93475519] [2021-06-06 00:11:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:01,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:01,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93475519] [2021-06-06 00:11:01,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93475519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:01,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640410808] [2021-06-06 00:11:01,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:01,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640410808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:01,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:01,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:11:01,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690282915] [2021-06-06 00:11:01,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:01,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:01,497 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:02,713 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-06-06 00:11:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:11:02,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:02,723 INFO L225 Difference]: With dead ends: 6089 [2021-06-06 00:11:02,723 INFO L226 Difference]: Without dead ends: 6089 [2021-06-06 00:11:02,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 748.0ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:11:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-06-06 00:11:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-06-06 00:11:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-06-06 00:11:02,776 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-06-06 00:11:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-06-06 00:11:02,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-06-06 00:11:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:02,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:02,779 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:02,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3961 [2021-06-06 00:11:02,981 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-06 00:11:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:02,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224098556] [2021-06-06 00:11:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:03,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:03,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224098556] [2021-06-06 00:11:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224098556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:03,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771464427] [2021-06-06 00:11:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:03,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:03,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:03,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:03,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:03,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771464427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:03,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:03,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:11:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903382309] [2021-06-06 00:11:03,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:03,152 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:04,198 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-06-06 00:11:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:11:04,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:04,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:04,204 INFO L225 Difference]: With dead ends: 5162 [2021-06-06 00:11:04,205 INFO L226 Difference]: Without dead ends: 5162 [2021-06-06 00:11:04,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:11:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-06 00:11:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-06-06 00:11:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-06-06 00:11:04,258 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-06-06 00:11:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:04,258 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-06-06 00:11:04,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-06-06 00:11:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:04,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:04,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:04,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:04,473 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-06-06 00:11:04,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:04,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895669461] [2021-06-06 00:11:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:04,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:04,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895669461] [2021-06-06 00:11:04,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895669461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:04,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617853095] [2021-06-06 00:11:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:04,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:11:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:04,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617853095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:04,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:04,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:11:04,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673834652] [2021-06-06 00:11:04,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:04,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:04,642 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:05,222 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-06-06 00:11:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:11:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:05,229 INFO L225 Difference]: With dead ends: 4589 [2021-06-06 00:11:05,229 INFO L226 Difference]: Without dead ends: 4589 [2021-06-06 00:11:05,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:11:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-06-06 00:11:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-06-06 00:11:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-06-06 00:11:05,272 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-06-06 00:11:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:05,272 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-06-06 00:11:05,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-06-06 00:11:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:05,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:05,275 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:05,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-06-06 00:11:05,475 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-06 00:11:05,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:05,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568042754] [2021-06-06 00:11:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:05,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:05,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568042754] [2021-06-06 00:11:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568042754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:05,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700196627] [2021-06-06 00:11:05,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:05,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:11:05,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:05,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:11:05,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:05,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700196627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:05,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:05,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:11:05,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110197881] [2021-06-06 00:11:05,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:11:05,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:11:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:11:05,597 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:05,773 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-06-06 00:11:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:11:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:05,778 INFO L225 Difference]: With dead ends: 3853 [2021-06-06 00:11:05,778 INFO L226 Difference]: Without dead ends: 3829 [2021-06-06 00:11:05,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-06 00:11:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-06-06 00:11:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-06-06 00:11:05,818 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-06-06 00:11:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:05,818 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-06-06 00:11:05,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-06-06 00:11:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:05,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:05,821 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:06,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3964 [2021-06-06 00:11:06,023 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-06 00:11:06,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:06,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980593300] [2021-06-06 00:11:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:06,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:06,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980593300] [2021-06-06 00:11:06,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980593300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:06,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003567983] [2021-06-06 00:11:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:06,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:06,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:06,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:06,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003567983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:06,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:06,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:11:06,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30195694] [2021-06-06 00:11:06,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:06,177 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:06,769 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-06-06 00:11:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:11:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:06,776 INFO L225 Difference]: With dead ends: 4524 [2021-06-06 00:11:06,776 INFO L226 Difference]: Without dead ends: 4477 [2021-06-06 00:11:06,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:11:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-06-06 00:11:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-06-06 00:11:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-06-06 00:11:06,824 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-06-06 00:11:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:06,824 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-06-06 00:11:06,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-06-06 00:11:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:06,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:06,827 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:07,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:07,041 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-06 00:11:07,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:07,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202063939] [2021-06-06 00:11:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:07,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:07,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202063939] [2021-06-06 00:11:07,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202063939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:07,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281168493] [2021-06-06 00:11:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:07,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:11:07,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:07,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281168493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:07,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:11:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851795359] [2021-06-06 00:11:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:07,190 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:07,904 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-06-06 00:11:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:11:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:07,911 INFO L225 Difference]: With dead ends: 4809 [2021-06-06 00:11:07,911 INFO L226 Difference]: Without dead ends: 4783 [2021-06-06 00:11:07,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:11:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-06 00:11:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-06-06 00:11:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-06-06 00:11:07,966 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-06-06 00:11:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:07,966 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-06-06 00:11:07,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-06-06 00:11:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:07,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:07,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:08,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3966,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:08,170 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-06 00:11:08,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:08,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107443775] [2021-06-06 00:11:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:08,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:08,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107443775] [2021-06-06 00:11:08,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107443775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:08,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483398100] [2021-06-06 00:11:08,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:08,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:11:08,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:08,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:08,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483398100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:08,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:08,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:11:08,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000237413] [2021-06-06 00:11:08,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:08,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:08,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:08,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:08,318 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:08,990 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-06-06 00:11:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:11:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:08,997 INFO L225 Difference]: With dead ends: 4801 [2021-06-06 00:11:08,997 INFO L226 Difference]: Without dead ends: 4786 [2021-06-06 00:11:08,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:11:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-06 00:11:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-06-06 00:11:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-06-06 00:11:09,044 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-06-06 00:11:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:09,044 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-06-06 00:11:09,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-06-06 00:11:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:09,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:09,048 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:09,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3967,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:09,248 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:09,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-06 00:11:09,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:09,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893816773] [2021-06-06 00:11:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:09,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:09,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893816773] [2021-06-06 00:11:09,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893816773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:09,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555409977] [2021-06-06 00:11:09,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:09,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555409977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:09,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:09,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:11:09,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894059405] [2021-06-06 00:11:09,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:09,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:09,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:09,392 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:09,923 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-06-06 00:11:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:11:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:09,930 INFO L225 Difference]: With dead ends: 5555 [2021-06-06 00:11:09,931 INFO L226 Difference]: Without dead ends: 5508 [2021-06-06 00:11:09,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:11:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-06-06 00:11:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-06-06 00:11:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-06-06 00:11:09,983 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-06-06 00:11:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:09,983 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-06-06 00:11:09,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-06-06 00:11:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:09,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:09,987 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:10,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-06 00:11:10,187 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-06 00:11:10,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:10,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408081926] [2021-06-06 00:11:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:10,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:10,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408081926] [2021-06-06 00:11:10,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408081926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:10,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599418400] [2021-06-06 00:11:10,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:10,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:11:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599418400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:10,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:10,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:11:10,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690259747] [2021-06-06 00:11:10,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:11:10,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:11:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:11:10,298 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:10,462 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-06-06 00:11:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:11:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:10,468 INFO L225 Difference]: With dead ends: 4339 [2021-06-06 00:11:10,468 INFO L226 Difference]: Without dead ends: 4339 [2021-06-06 00:11:10,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-06 00:11:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-06-06 00:11:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-06-06 00:11:10,509 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-06-06 00:11:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:10,509 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-06-06 00:11:10,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-06-06 00:11:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:10,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:10,512 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:10,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-06 00:11:10,712 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-06 00:11:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:10,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053660263] [2021-06-06 00:11:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:10,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053660263] [2021-06-06 00:11:10,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053660263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220674467] [2021-06-06 00:11:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:10,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:11:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:10,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220674467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:10,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:10,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:11:10,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782260570] [2021-06-06 00:11:10,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:10,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:10,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:10,867 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:11,556 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-06-06 00:11:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:11:11,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:11,564 INFO L225 Difference]: With dead ends: 6209 [2021-06-06 00:11:11,564 INFO L226 Difference]: Without dead ends: 6209 [2021-06-06 00:11:11,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:11:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-06-06 00:11:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-06-06 00:11:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-06-06 00:11:11,618 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-06-06 00:11:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:11,618 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-06-06 00:11:11,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-06-06 00:11:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:11,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:11,622 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:11,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:11,822 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-06 00:11:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:11,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303043121] [2021-06-06 00:11:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:11,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:11,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303043121] [2021-06-06 00:11:11,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303043121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:11,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505503866] [2021-06-06 00:11:11,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:11,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:11,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:11,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:11,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505503866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:11,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:11,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:11:11,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323620318] [2021-06-06 00:11:11,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:11,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:11,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:11,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:11,953 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:12,696 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-06-06 00:11:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:11:12,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:12,705 INFO L225 Difference]: With dead ends: 6471 [2021-06-06 00:11:12,705 INFO L226 Difference]: Without dead ends: 6471 [2021-06-06 00:11:12,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:11:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-06 00:11:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-06-06 00:11:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-06-06 00:11:12,764 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-06-06 00:11:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:12,764 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-06-06 00:11:12,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-06-06 00:11:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:12,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:12,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:12,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:12,968 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-06 00:11:12,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:12,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484753357] [2021-06-06 00:11:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:13,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:13,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484753357] [2021-06-06 00:11:13,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484753357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:13,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134609121] [2021-06-06 00:11:13,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:13,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:11:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:13,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134609121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:13,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:13,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:11:13,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430901925] [2021-06-06 00:11:13,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:13,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:13,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:13,093 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:13,708 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-06-06 00:11:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:11:13,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:13,717 INFO L225 Difference]: With dead ends: 6662 [2021-06-06 00:11:13,717 INFO L226 Difference]: Without dead ends: 6626 [2021-06-06 00:11:13,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:11:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-06-06 00:11:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-06-06 00:11:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-06-06 00:11:13,804 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-06-06 00:11:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:13,804 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-06-06 00:11:13,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-06-06 00:11:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:13,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:13,808 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:14,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:14,009 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-06 00:11:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558495865] [2021-06-06 00:11:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:14,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558495865] [2021-06-06 00:11:14,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558495865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:14,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394732550] [2021-06-06 00:11:14,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:14,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:11:14,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394732550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:14,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:14,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:11:14,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372721731] [2021-06-06 00:11:14,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:14,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:14,147 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:14,740 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-06-06 00:11:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:11:14,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:14,749 INFO L225 Difference]: With dead ends: 6820 [2021-06-06 00:11:14,749 INFO L226 Difference]: Without dead ends: 6820 [2021-06-06 00:11:14,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:11:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-06-06 00:11:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-06-06 00:11:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-06-06 00:11:14,815 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-06-06 00:11:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:14,815 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-06-06 00:11:14,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-06-06 00:11:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:14,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:14,819 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:15,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3973 [2021-06-06 00:11:15,019 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-06 00:11:15,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:15,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478668536] [2021-06-06 00:11:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:15,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:15,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478668536] [2021-06-06 00:11:15,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478668536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:15,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085363957] [2021-06-06 00:11:15,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:15,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:15,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:15,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085363957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:15,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:15,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:11:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559819607] [2021-06-06 00:11:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:15,143 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:15,809 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-06-06 00:11:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:11:15,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:15,818 INFO L225 Difference]: With dead ends: 5973 [2021-06-06 00:11:15,818 INFO L226 Difference]: Without dead ends: 5969 [2021-06-06 00:11:15,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:11:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-06-06 00:11:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-06-06 00:11:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-06-06 00:11:15,873 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-06-06 00:11:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:15,873 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-06-06 00:11:15,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-06-06 00:11:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:15,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:15,876 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:16,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:16,077 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-06 00:11:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:16,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773383930] [2021-06-06 00:11:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:16,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:16,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773383930] [2021-06-06 00:11:16,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773383930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:16,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303999909] [2021-06-06 00:11:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:16,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:16,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303999909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:16,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:16,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:11:16,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459043752] [2021-06-06 00:11:16,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:16,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:16,229 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:17,275 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-06-06 00:11:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:11:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:17,289 INFO L225 Difference]: With dead ends: 9218 [2021-06-06 00:11:17,289 INFO L226 Difference]: Without dead ends: 9218 [2021-06-06 00:11:17,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 614.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:11:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-06-06 00:11:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-06-06 00:11:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-06-06 00:11:17,372 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-06-06 00:11:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:17,372 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-06-06 00:11:17,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-06-06 00:11:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:17,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:17,376 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:17,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:17,577 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:17,577 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-06 00:11:17,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:17,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348061874] [2021-06-06 00:11:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:17,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:17,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348061874] [2021-06-06 00:11:17,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348061874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:17,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312894756] [2021-06-06 00:11:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:17,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:11:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:17,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312894756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:17,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:17,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:11:17,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85071375] [2021-06-06 00:11:17,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:17,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:17,731 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:18,747 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-06-06 00:11:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:11:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:18,761 INFO L225 Difference]: With dead ends: 9047 [2021-06-06 00:11:18,761 INFO L226 Difference]: Without dead ends: 9047 [2021-06-06 00:11:18,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 613.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:11:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-06-06 00:11:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-06-06 00:11:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-06-06 00:11:18,844 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-06-06 00:11:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-06-06 00:11:18,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-06-06 00:11:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:18,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:18,848 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:19,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:19,049 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-06 00:11:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:19,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274323704] [2021-06-06 00:11:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:19,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274323704] [2021-06-06 00:11:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274323704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680753766] [2021-06-06 00:11:19,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:19,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:19,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:19,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:19,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680753766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:19,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:19,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:11:19,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101863591] [2021-06-06 00:11:19,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:19,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:19,209 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:20,161 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-06-06 00:11:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:11:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:20,173 INFO L225 Difference]: With dead ends: 8494 [2021-06-06 00:11:20,173 INFO L226 Difference]: Without dead ends: 8494 [2021-06-06 00:11:20,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 507.0ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:11:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-06-06 00:11:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-06-06 00:11:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-06-06 00:11:20,246 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-06-06 00:11:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:20,246 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-06-06 00:11:20,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-06-06 00:11:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:20,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:20,249 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:20,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-06-06 00:11:20,450 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-06 00:11:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:20,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207604697] [2021-06-06 00:11:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:20,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:20,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207604697] [2021-06-06 00:11:20,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207604697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:20,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345133432] [2021-06-06 00:11:20,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:20,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:11:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:20,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345133432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:20,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:20,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:11:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704616473] [2021-06-06 00:11:20,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:20,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:20,588 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:21,470 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-06-06 00:11:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:11:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:21,482 INFO L225 Difference]: With dead ends: 8003 [2021-06-06 00:11:21,482 INFO L226 Difference]: Without dead ends: 7995 [2021-06-06 00:11:21,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:11:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-06 00:11:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-06-06 00:11:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-06-06 00:11:21,578 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-06-06 00:11:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:21,578 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-06-06 00:11:21,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-06-06 00:11:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:21,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:21,582 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:21,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-06 00:11:21,782 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-06 00:11:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:21,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123836145] [2021-06-06 00:11:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:21,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123836145] [2021-06-06 00:11:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123836145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171912458] [2021-06-06 00:11:21,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:21,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:11:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171912458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:21,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:21,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:11:21,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835024124] [2021-06-06 00:11:21,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:21,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:21,957 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:22,934 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-06-06 00:11:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:11:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:22,946 INFO L225 Difference]: With dead ends: 7921 [2021-06-06 00:11:22,946 INFO L226 Difference]: Without dead ends: 7921 [2021-06-06 00:11:22,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:11:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-06-06 00:11:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-06-06 00:11:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-06-06 00:11:23,019 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-06-06 00:11:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:23,019 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-06-06 00:11:23,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-06-06 00:11:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:23,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:23,023 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:23,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3979,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:23,225 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:23,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-06 00:11:23,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:23,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732972739] [2021-06-06 00:11:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:23,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732972739] [2021-06-06 00:11:23,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732972739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110898688] [2021-06-06 00:11:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:23,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110898688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:23,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:23,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:11:23,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743862140] [2021-06-06 00:11:23,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:23,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:23,370 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:24,313 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-06-06 00:11:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:11:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:24,325 INFO L225 Difference]: With dead ends: 7589 [2021-06-06 00:11:24,325 INFO L226 Difference]: Without dead ends: 7581 [2021-06-06 00:11:24,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:11:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-06-06 00:11:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-06-06 00:11:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-06-06 00:11:24,391 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-06-06 00:11:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:24,391 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-06-06 00:11:24,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-06-06 00:11:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:24,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:24,394 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:24,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-06-06 00:11:24,595 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-06 00:11:24,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:24,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779171293] [2021-06-06 00:11:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:24,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779171293] [2021-06-06 00:11:24,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779171293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540215235] [2021-06-06 00:11:24,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:24,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:24,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:24,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:24,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540215235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:11:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398875689] [2021-06-06 00:11:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:24,748 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:25,611 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-06-06 00:11:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:11:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:25,619 INFO L225 Difference]: With dead ends: 5790 [2021-06-06 00:11:25,619 INFO L226 Difference]: Without dead ends: 5790 [2021-06-06 00:11:25,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:11:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-06-06 00:11:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-06-06 00:11:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-06-06 00:11:25,672 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-06-06 00:11:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:25,672 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-06-06 00:11:25,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-06-06 00:11:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:25,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:25,675 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:25,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:25,876 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-06 00:11:25,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:25,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663209241] [2021-06-06 00:11:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:25,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663209241] [2021-06-06 00:11:25,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663209241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601870989] [2021-06-06 00:11:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:25,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:11:25,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:26,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601870989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:26,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:26,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:11:26,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139669880] [2021-06-06 00:11:26,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:26,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:26,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:26,043 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:27,152 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-06-06 00:11:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:11:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:27,162 INFO L225 Difference]: With dead ends: 6569 [2021-06-06 00:11:27,162 INFO L226 Difference]: Without dead ends: 6569 [2021-06-06 00:11:27,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 693.0ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:11:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-06-06 00:11:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-06-06 00:11:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-06-06 00:11:27,259 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-06-06 00:11:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:27,259 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-06-06 00:11:27,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-06-06 00:11:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:27,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:27,263 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:27,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:27,463 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-06 00:11:27,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:27,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728343082] [2021-06-06 00:11:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:27,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:27,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728343082] [2021-06-06 00:11:27,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728343082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:27,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748402094] [2021-06-06 00:11:27,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:27,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:27,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:27,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:27,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748402094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:27,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:27,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:11:27,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418989331] [2021-06-06 00:11:27,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:27,630 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:28,642 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-06-06 00:11:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:11:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:28,651 INFO L225 Difference]: With dead ends: 6132 [2021-06-06 00:11:28,651 INFO L226 Difference]: Without dead ends: 6128 [2021-06-06 00:11:28,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:11:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-06 00:11:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-06-06 00:11:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-06-06 00:11:28,707 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-06-06 00:11:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:28,708 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-06-06 00:11:28,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-06-06 00:11:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:28,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:28,711 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:28,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:28,911 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-06-06 00:11:28,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:28,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475053861] [2021-06-06 00:11:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:28,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:28,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475053861] [2021-06-06 00:11:28,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475053861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:28,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142142286] [2021-06-06 00:11:28,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:28,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:11:28,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:28,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:29,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142142286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:29,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:29,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:11:29,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993073471] [2021-06-06 00:11:29,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:29,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:29,054 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:29,625 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-06-06 00:11:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:11:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:29,634 INFO L225 Difference]: With dead ends: 5268 [2021-06-06 00:11:29,634 INFO L226 Difference]: Without dead ends: 5268 [2021-06-06 00:11:29,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:11:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-06-06 00:11:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-06-06 00:11:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-06-06 00:11:29,686 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-06-06 00:11:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:29,686 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-06-06 00:11:29,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-06-06 00:11:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:29,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:29,689 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:29,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:29,890 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-06-06 00:11:29,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:29,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018142182] [2021-06-06 00:11:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:29,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:29,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018142182] [2021-06-06 00:11:29,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018142182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:29,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710345128] [2021-06-06 00:11:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:29,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:30,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710345128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:30,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:30,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:11:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56009849] [2021-06-06 00:11:30,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:30,032 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:30,787 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-06-06 00:11:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:11:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:30,795 INFO L225 Difference]: With dead ends: 5584 [2021-06-06 00:11:30,795 INFO L226 Difference]: Without dead ends: 5584 [2021-06-06 00:11:30,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:11:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-06-06 00:11:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-06-06 00:11:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-06-06 00:11:30,847 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-06-06 00:11:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:30,847 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-06-06 00:11:30,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-06-06 00:11:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:30,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:30,850 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:31,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3985 [2021-06-06 00:11:31,050 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:31,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-06-06 00:11:31,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:31,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409091162] [2021-06-06 00:11:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:31,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:31,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409091162] [2021-06-06 00:11:31,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409091162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:31,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422422567] [2021-06-06 00:11:31,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:31,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:31,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:31,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:31,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422422567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:31,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:31,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:11:31,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543002851] [2021-06-06 00:11:31,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:31,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:31,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:31,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:31,191 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:32,016 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-06-06 00:11:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:11:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:32,024 INFO L225 Difference]: With dead ends: 6079 [2021-06-06 00:11:32,024 INFO L226 Difference]: Without dead ends: 6079 [2021-06-06 00:11:32,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:11:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-06-06 00:11:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-06-06 00:11:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-06-06 00:11:32,084 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-06-06 00:11:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:32,084 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-06-06 00:11:32,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-06-06 00:11:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:32,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:32,087 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:32,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:32,288 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-06-06 00:11:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:32,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511639800] [2021-06-06 00:11:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:32,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511639800] [2021-06-06 00:11:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511639800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748717653] [2021-06-06 00:11:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:32,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:11:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748717653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:32,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:32,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:11:32,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577048594] [2021-06-06 00:11:32,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:32,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:32,441 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:33,004 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-06-06 00:11:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:11:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:33,014 INFO L225 Difference]: With dead ends: 6807 [2021-06-06 00:11:33,014 INFO L226 Difference]: Without dead ends: 6807 [2021-06-06 00:11:33,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:11:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-06-06 00:11:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-06-06 00:11:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-06-06 00:11:33,101 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-06-06 00:11:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:33,101 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-06-06 00:11:33,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-06-06 00:11:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:33,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:33,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:33,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-06-06 00:11:33,307 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-06-06 00:11:33,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:33,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61778127] [2021-06-06 00:11:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:33,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:33,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61778127] [2021-06-06 00:11:33,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61778127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:33,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043880170] [2021-06-06 00:11:33,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:33,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:33,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043880170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:33,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:33,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:11:33,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064973338] [2021-06-06 00:11:33,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:33,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:33,453 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:34,246 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-06-06 00:11:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:11:34,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:34,258 INFO L225 Difference]: With dead ends: 7353 [2021-06-06 00:11:34,258 INFO L226 Difference]: Without dead ends: 7349 [2021-06-06 00:11:34,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:11:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-06-06 00:11:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-06-06 00:11:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-06-06 00:11:34,334 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-06-06 00:11:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:34,334 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-06-06 00:11:34,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-06-06 00:11:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:34,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:34,339 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:34,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:34,540 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-06 00:11:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:34,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723810436] [2021-06-06 00:11:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:34,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:34,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723810436] [2021-06-06 00:11:34,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723810436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:34,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067770773] [2021-06-06 00:11:34,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:34,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:11:34,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:34,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067770773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:34,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:34,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:11:34,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895248406] [2021-06-06 00:11:34,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:34,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:34,706 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:35,512 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-06-06 00:11:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:11:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:35,525 INFO L225 Difference]: With dead ends: 8141 [2021-06-06 00:11:35,526 INFO L226 Difference]: Without dead ends: 8132 [2021-06-06 00:11:35,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:11:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-06 00:11:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-06-06 00:11:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-06-06 00:11:35,614 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-06-06 00:11:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:35,614 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-06-06 00:11:35,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-06-06 00:11:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:35,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:35,619 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3989,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:35,820 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-06 00:11:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:35,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716566087] [2021-06-06 00:11:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:35,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:35,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716566087] [2021-06-06 00:11:35,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716566087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:35,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495585553] [2021-06-06 00:11:35,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:35,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:11:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:35,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495585553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:35,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:35,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:11:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945740772] [2021-06-06 00:11:35,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:35,958 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:36,787 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-06-06 00:11:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:11:36,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:36,835 INFO L225 Difference]: With dead ends: 8418 [2021-06-06 00:11:36,835 INFO L226 Difference]: Without dead ends: 8418 [2021-06-06 00:11:36,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:11:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-06 00:11:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-06-06 00:11:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-06-06 00:11:36,913 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-06-06 00:11:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:36,913 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-06-06 00:11:36,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-06-06 00:11:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:36,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:36,919 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:37,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-06-06 00:11:37,119 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-06 00:11:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:37,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184408691] [2021-06-06 00:11:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:37,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:37,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184408691] [2021-06-06 00:11:37,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184408691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:37,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061722517] [2021-06-06 00:11:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:37,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061722517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:37,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:37,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:11:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76347703] [2021-06-06 00:11:37,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:11:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:11:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:11:37,244 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:37,686 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-06-06 00:11:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:11:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:37,699 INFO L225 Difference]: With dead ends: 7845 [2021-06-06 00:11:37,699 INFO L226 Difference]: Without dead ends: 7762 [2021-06-06 00:11:37,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-06-06 00:11:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-06-06 00:11:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-06-06 00:11:37,797 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-06-06 00:11:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:37,797 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-06-06 00:11:37,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-06-06 00:11:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:37,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:37,805 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:38,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-06-06 00:11:38,005 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-06 00:11:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:38,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196966130] [2021-06-06 00:11:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:38,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:38,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196966130] [2021-06-06 00:11:38,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196966130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:38,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268076225] [2021-06-06 00:11:38,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:38,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:38,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:11:38,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:38,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268076225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:38,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:38,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:11:38,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439909913] [2021-06-06 00:11:38,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:11:38,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:38,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:11:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:11:38,110 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:38,286 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-06-06 00:11:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:38,299 INFO L225 Difference]: With dead ends: 8103 [2021-06-06 00:11:38,299 INFO L226 Difference]: Without dead ends: 8103 [2021-06-06 00:11:38,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-06-06 00:11:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-06-06 00:11:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-06-06 00:11:38,447 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-06-06 00:11:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:38,447 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-06-06 00:11:38,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-06-06 00:11:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:38,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:38,456 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:38,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:38,656 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-06 00:11:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:38,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475798994] [2021-06-06 00:11:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:38,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:38,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475798994] [2021-06-06 00:11:38,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475798994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:38,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466918604] [2021-06-06 00:11:38,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:38,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:11:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466918604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:38,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:38,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:11:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172639044] [2021-06-06 00:11:38,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:38,808 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:39,536 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-06-06 00:11:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:11:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:39,558 INFO L225 Difference]: With dead ends: 12480 [2021-06-06 00:11:39,558 INFO L226 Difference]: Without dead ends: 12480 [2021-06-06 00:11:39,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:11:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-06-06 00:11:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-06-06 00:11:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-06-06 00:11:39,704 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-06-06 00:11:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:39,705 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-06-06 00:11:39,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-06-06 00:11:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:39,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:39,714 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:39,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:39,915 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-06 00:11:39,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:39,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638347917] [2021-06-06 00:11:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:39,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638347917] [2021-06-06 00:11:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638347917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610603139] [2021-06-06 00:11:39,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:39,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:39,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:39,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610603139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:40,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:40,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:11:40,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078705457] [2021-06-06 00:11:40,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:11:40,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:11:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:11:40,036 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:40,715 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-06-06 00:11:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:11:40,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:40,740 INFO L225 Difference]: With dead ends: 12633 [2021-06-06 00:11:40,740 INFO L226 Difference]: Without dead ends: 12633 [2021-06-06 00:11:40,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:11:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-06-06 00:11:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-06-06 00:11:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-06-06 00:11:40,906 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-06-06 00:11:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:40,906 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-06-06 00:11:40,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-06-06 00:11:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:40,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:40,917 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:41,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3994 [2021-06-06 00:11:41,117 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-06 00:11:41,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:41,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170049474] [2021-06-06 00:11:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:41,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:41,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170049474] [2021-06-06 00:11:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170049474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:41,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996042530] [2021-06-06 00:11:41,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:41,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:11:41,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996042530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:41,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:41,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:11:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032796814] [2021-06-06 00:11:41,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:11:41,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:11:41,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:11:41,228 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:41,594 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-06-06 00:11:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:11:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:41,609 INFO L225 Difference]: With dead ends: 9357 [2021-06-06 00:11:41,609 INFO L226 Difference]: Without dead ends: 9327 [2021-06-06 00:11:41,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:11:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-06 00:11:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-06-06 00:11:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-06-06 00:11:41,740 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-06-06 00:11:41,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:41,740 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-06-06 00:11:41,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-06-06 00:11:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:41,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:41,750 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:41,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:41,951 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:41,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-06 00:11:41,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:41,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076323001] [2021-06-06 00:11:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:41,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:41,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076323001] [2021-06-06 00:11:41,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076323001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:41,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698501006] [2021-06-06 00:11:41,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:42,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:11:42,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:42,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:42,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:42,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698501006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:42,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:42,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:11:42,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047976675] [2021-06-06 00:11:42,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:11:42,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:11:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:11:42,111 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:42,459 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-06-06 00:11:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:11:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:42,475 INFO L225 Difference]: With dead ends: 9961 [2021-06-06 00:11:42,476 INFO L226 Difference]: Without dead ends: 9961 [2021-06-06 00:11:42,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:11:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-06 00:11:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-06-06 00:11:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-06-06 00:11:42,612 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-06-06 00:11:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:42,613 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-06-06 00:11:42,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-06-06 00:11:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:42,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:42,625 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:42,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3996,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:42,825 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-06 00:11:42,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:42,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013592032] [2021-06-06 00:11:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:42,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:42,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013592032] [2021-06-06 00:11:42,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013592032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:42,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789003602] [2021-06-06 00:11:42,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789003602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:11:42,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355292077] [2021-06-06 00:11:42,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:11:42,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:42,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:11:42,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:11:42,941 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:43,541 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-06-06 00:11:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:11:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:43,566 INFO L225 Difference]: With dead ends: 13358 [2021-06-06 00:11:43,566 INFO L226 Difference]: Without dead ends: 13354 [2021-06-06 00:11:43,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:11:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-06-06 00:11:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-06-06 00:11:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-06-06 00:11:43,768 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-06-06 00:11:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:43,769 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-06-06 00:11:43,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-06-06 00:11:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:43,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:43,779 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:43,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:43,981 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-06 00:11:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:43,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335389896] [2021-06-06 00:11:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335389896] [2021-06-06 00:11:44,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335389896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:44,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736009925] [2021-06-06 00:11:44,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:44,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:44,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:44,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:11:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:44,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736009925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:44,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:44,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:11:44,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577553041] [2021-06-06 00:11:44,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:11:44,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:44,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:11:44,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:11:44,100 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:44,508 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-06-06 00:11:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:11:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:44,525 INFO L225 Difference]: With dead ends: 10180 [2021-06-06 00:11:44,526 INFO L226 Difference]: Without dead ends: 10180 [2021-06-06 00:11:44,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-06-06 00:11:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-06-06 00:11:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-06-06 00:11:44,661 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-06-06 00:11:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:44,661 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-06-06 00:11:44,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-06-06 00:11:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:44,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:44,672 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:44,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:44,872 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:44,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-06 00:11:44,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:44,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628844883] [2021-06-06 00:11:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:44,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628844883] [2021-06-06 00:11:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628844883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159730411] [2021-06-06 00:11:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:44,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:11:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:44,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:44,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:44,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159730411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:44,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:44,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:11:44,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977901759] [2021-06-06 00:11:44,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:11:44,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:44,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:11:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:11:44,995 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:45,739 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-06-06 00:11:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:11:45,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:45,766 INFO L225 Difference]: With dead ends: 13241 [2021-06-06 00:11:45,766 INFO L226 Difference]: Without dead ends: 13229 [2021-06-06 00:11:45,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:11:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-06-06 00:11:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-06-06 00:11:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-06-06 00:11:45,970 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-06-06 00:11:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:45,970 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-06-06 00:11:45,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-06-06 00:11:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:45,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:45,981 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:46,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-06 00:11:46,182 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-06 00:11:46,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:46,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020981218] [2021-06-06 00:11:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:46,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020981218] [2021-06-06 00:11:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020981218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165559218] [2021-06-06 00:11:46,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:46,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:46,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:46,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165559218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:46,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:46,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:11:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371548137] [2021-06-06 00:11:46,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:46,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:46,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:46,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:46,321 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:47,464 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-06-06 00:11:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:11:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:47,501 INFO L225 Difference]: With dead ends: 20083 [2021-06-06 00:11:47,501 INFO L226 Difference]: Without dead ends: 20083 [2021-06-06 00:11:47,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:11:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-06-06 00:11:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-06-06 00:11:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-06-06 00:11:47,825 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-06-06 00:11:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:47,826 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-06-06 00:11:47,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-06-06 00:11:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:47,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:47,841 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:48,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-06 00:11:48,042 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-06 00:11:48,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:48,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816815352] [2021-06-06 00:11:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:48,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816815352] [2021-06-06 00:11:48,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816815352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358643869] [2021-06-06 00:11:48,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:48,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:11:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358643869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:48,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:48,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:11:48,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534859075] [2021-06-06 00:11:48,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:48,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:48,175 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:49,238 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-06-06 00:11:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:11:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:49,273 INFO L225 Difference]: With dead ends: 19333 [2021-06-06 00:11:49,274 INFO L226 Difference]: Without dead ends: 19321 [2021-06-06 00:11:49,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:11:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-06-06 00:11:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-06-06 00:11:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-06-06 00:11:49,606 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-06-06 00:11:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:49,606 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-06-06 00:11:49,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-06-06 00:11:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:49,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:49,620 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:49,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4001,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:49,821 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-06 00:11:49,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:49,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314396080] [2021-06-06 00:11:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:49,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:49,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314396080] [2021-06-06 00:11:49,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314396080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:49,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790753578] [2021-06-06 00:11:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:49,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:11:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:49,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:49,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790753578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:49,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:49,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:11:49,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375813176] [2021-06-06 00:11:49,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:11:49,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:49,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:11:49,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:11:49,955 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:50,932 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-06-06 00:11:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:11:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:50,966 INFO L225 Difference]: With dead ends: 19147 [2021-06-06 00:11:50,967 INFO L226 Difference]: Without dead ends: 19111 [2021-06-06 00:11:50,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:11:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-06-06 00:11:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-06-06 00:11:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-06-06 00:11:51,219 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-06-06 00:11:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:51,219 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-06-06 00:11:51,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-06-06 00:11:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:51,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:51,233 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:51,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-06-06 00:11:51,434 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-06 00:11:51,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:51,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804962446] [2021-06-06 00:11:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:51,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804962446] [2021-06-06 00:11:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804962446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400058222] [2021-06-06 00:11:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:51,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400058222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:51,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:51,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:11:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693412109] [2021-06-06 00:11:51,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:51,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:51,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:51,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:51,671 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:53,082 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-06-06 00:11:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:11:53,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:53,116 INFO L225 Difference]: With dead ends: 19074 [2021-06-06 00:11:53,116 INFO L226 Difference]: Without dead ends: 19074 [2021-06-06 00:11:53,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 884.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:11:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-06-06 00:11:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-06-06 00:11:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-06-06 00:11:53,367 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-06-06 00:11:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:53,367 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-06-06 00:11:53,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-06-06 00:11:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:53,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:53,382 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:53,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:53,582 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-06 00:11:53,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:53,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513431] [2021-06-06 00:11:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:53,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513431] [2021-06-06 00:11:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972140574] [2021-06-06 00:11:53,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:53,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:53,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:53,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972140574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:53,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:53,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:11:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126759846] [2021-06-06 00:11:53,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:53,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:53,832 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:55,210 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-06-06 00:11:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:11:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:55,247 INFO L225 Difference]: With dead ends: 18684 [2021-06-06 00:11:55,247 INFO L226 Difference]: Without dead ends: 18672 [2021-06-06 00:11:55,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 912.9ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:11:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-06-06 00:11:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-06-06 00:11:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-06-06 00:11:55,496 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-06-06 00:11:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:55,496 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-06-06 00:11:55,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-06-06 00:11:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:55,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:55,512 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:55,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:55,712 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-06 00:11:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170933632] [2021-06-06 00:11:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:55,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:55,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170933632] [2021-06-06 00:11:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170933632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:55,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875374732] [2021-06-06 00:11:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:55,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:11:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:55,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:55,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875374732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:55,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:55,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:11:55,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272512972] [2021-06-06 00:11:55,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:11:55,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:11:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:11:55,882 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:57,033 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-06-06 00:11:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:11:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:57,066 INFO L225 Difference]: With dead ends: 17924 [2021-06-06 00:11:57,066 INFO L226 Difference]: Without dead ends: 17888 [2021-06-06 00:11:57,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:11:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-06-06 00:11:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-06-06 00:11:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-06-06 00:11:57,308 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-06-06 00:11:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:57,308 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-06-06 00:11:57,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-06-06 00:11:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:57,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:57,322 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:57,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:57,523 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-06 00:11:57,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:57,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738045858] [2021-06-06 00:11:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:57,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:57,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738045858] [2021-06-06 00:11:57,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738045858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:57,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939538344] [2021-06-06 00:11:57,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:57,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:57,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939538344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:57,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:57,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:11:57,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997448766] [2021-06-06 00:11:57,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:57,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:57,684 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:59,015 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-06-06 00:11:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-06 00:11:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:11:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:59,072 INFO L225 Difference]: With dead ends: 26041 [2021-06-06 00:11:59,073 INFO L226 Difference]: Without dead ends: 26041 [2021-06-06 00:11:59,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 774.7ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:11:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-06-06 00:11:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-06-06 00:11:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-06-06 00:11:59,463 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-06-06 00:11:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-06-06 00:11:59,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-06-06 00:11:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:11:59,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:59,479 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:59,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-06-06 00:11:59,679 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-06 00:11:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:59,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903924291] [2021-06-06 00:11:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:11:59,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:59,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903924291] [2021-06-06 00:11:59,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903924291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:59,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781915498] [2021-06-06 00:11:59,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:59,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:11:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:11:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:59,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781915498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:59,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:59,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:11:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124479509] [2021-06-06 00:11:59,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:11:59,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:11:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:11:59,849 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:01,111 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-06-06 00:12:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:12:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:01,163 INFO L225 Difference]: With dead ends: 25481 [2021-06-06 00:12:01,163 INFO L226 Difference]: Without dead ends: 25481 [2021-06-06 00:12:01,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:12:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-06-06 00:12:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-06-06 00:12:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-06-06 00:12:01,464 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-06-06 00:12:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:01,464 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-06-06 00:12:01,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-06-06 00:12:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:01,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:01,479 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:01,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:01,679 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-06 00:12:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:01,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293900160] [2021-06-06 00:12:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:01,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293900160] [2021-06-06 00:12:01,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293900160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51399238] [2021-06-06 00:12:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:01,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:12:01,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:01,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51399238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:01,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:01,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:12:01,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493096805] [2021-06-06 00:12:01,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:12:01,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:01,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:12:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:12:01,910 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:02,784 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-06-06 00:12:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:12:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:02,826 INFO L225 Difference]: With dead ends: 20226 [2021-06-06 00:12:02,826 INFO L226 Difference]: Without dead ends: 20226 [2021-06-06 00:12:02,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:12:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-06-06 00:12:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-06-06 00:12:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-06-06 00:12:03,098 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-06-06 00:12:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:03,098 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-06-06 00:12:03,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-06-06 00:12:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:03,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:03,113 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:03,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:03,314 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-06 00:12:03,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:03,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857781743] [2021-06-06 00:12:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:03,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:03,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857781743] [2021-06-06 00:12:03,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857781743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:03,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575049426] [2021-06-06 00:12:03,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:03,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:03,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575049426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:03,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:03,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:12:03,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010332100] [2021-06-06 00:12:03,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:12:03,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:12:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:12:03,469 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:04,254 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-06-06 00:12:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:12:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:04,289 INFO L225 Difference]: With dead ends: 18775 [2021-06-06 00:12:04,290 INFO L226 Difference]: Without dead ends: 18775 [2021-06-06 00:12:04,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:12:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-06-06 00:12:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-06-06 00:12:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-06-06 00:12:04,657 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-06-06 00:12:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:04,657 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-06-06 00:12:04,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-06-06 00:12:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:04,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:04,674 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:04,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:04,874 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:04,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-06 00:12:04,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:04,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896727463] [2021-06-06 00:12:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:04,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:04,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896727463] [2021-06-06 00:12:04,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896727463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:04,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899699115] [2021-06-06 00:12:04,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:04,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:04,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:05,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899699115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:05,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:05,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:12:05,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062863911] [2021-06-06 00:12:05,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:05,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:05,052 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:06,219 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-06-06 00:12:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:12:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:06,257 INFO L225 Difference]: With dead ends: 19382 [2021-06-06 00:12:06,257 INFO L226 Difference]: Without dead ends: 19382 [2021-06-06 00:12:06,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:12:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-06-06 00:12:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-06-06 00:12:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-06-06 00:12:06,517 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-06-06 00:12:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:06,517 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-06-06 00:12:06,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-06-06 00:12:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:06,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:06,532 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:06,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-06 00:12:06,732 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-06 00:12:06,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:06,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564804530] [2021-06-06 00:12:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:06,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:06,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564804530] [2021-06-06 00:12:06,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564804530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:06,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961657749] [2021-06-06 00:12:06,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:06,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:12:06,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:06,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:06,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961657749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:06,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:06,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:12:06,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879483806] [2021-06-06 00:12:06,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:06,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:06,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:06,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:06,891 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:07,842 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-06-06 00:12:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:12:07,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:07,949 INFO L225 Difference]: With dead ends: 18954 [2021-06-06 00:12:07,949 INFO L226 Difference]: Without dead ends: 18950 [2021-06-06 00:12:07,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:12:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-06-06 00:12:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-06-06 00:12:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-06-06 00:12:08,184 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-06-06 00:12:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:08,184 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-06-06 00:12:08,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-06-06 00:12:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:08,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:08,200 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:08,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-06 00:12:08,400 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-06 00:12:08,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:08,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965673004] [2021-06-06 00:12:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:08,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965673004] [2021-06-06 00:12:08,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965673004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972303477] [2021-06-06 00:12:08,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:08,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:08,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:08,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:08,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:08,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972303477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:08,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:08,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:12:08,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488657434] [2021-06-06 00:12:08,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:08,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:08,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:08,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:08,562 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:09,637 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-06-06 00:12:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:12:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:09,672 INFO L225 Difference]: With dead ends: 18381 [2021-06-06 00:12:09,672 INFO L226 Difference]: Without dead ends: 18381 [2021-06-06 00:12:09,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 670.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:12:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-06-06 00:12:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-06-06 00:12:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-06-06 00:12:09,934 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-06-06 00:12:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:09,934 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-06-06 00:12:09,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-06-06 00:12:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:09,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:09,949 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:10,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-06-06 00:12:10,150 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-06 00:12:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:10,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231133569] [2021-06-06 00:12:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:10,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:10,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231133569] [2021-06-06 00:12:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231133569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:10,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947678503] [2021-06-06 00:12:10,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:10,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:12:10,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:10,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947678503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:10,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:10,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:12:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688939242] [2021-06-06 00:12:10,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:10,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:10,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:10,309 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:11,313 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-06-06 00:12:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:12:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:11,348 INFO L225 Difference]: With dead ends: 18091 [2021-06-06 00:12:11,348 INFO L226 Difference]: Without dead ends: 18079 [2021-06-06 00:12:11,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:12:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-06-06 00:12:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-06-06 00:12:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-06-06 00:12:11,591 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-06-06 00:12:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:11,591 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-06-06 00:12:11,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-06-06 00:12:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:11,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:11,606 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:11,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-06 00:12:11,807 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-06-06 00:12:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:11,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102108661] [2021-06-06 00:12:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:11,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102108661] [2021-06-06 00:12:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102108661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700966612] [2021-06-06 00:12:11,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:11,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:12:11,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:11,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700966612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:11,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:11,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:12:11,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220188540] [2021-06-06 00:12:11,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:11,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:11,938 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:12,398 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-06-06 00:12:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:12:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:12,429 INFO L225 Difference]: With dead ends: 15599 [2021-06-06 00:12:12,429 INFO L226 Difference]: Without dead ends: 15599 [2021-06-06 00:12:12,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:12:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-06-06 00:12:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-06-06 00:12:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-06-06 00:12:12,649 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-06-06 00:12:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:12,649 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-06-06 00:12:12,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-06-06 00:12:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:12,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:12,665 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:12,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:12,866 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-06-06 00:12:12,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:12,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108654224] [2021-06-06 00:12:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108654224] [2021-06-06 00:12:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108654224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818901704] [2021-06-06 00:12:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:12,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:12:12,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:12,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818901704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:12,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:12,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:12:12,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479087524] [2021-06-06 00:12:12,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:12:12,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:12,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:12:12,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:12:12,992 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:13,509 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-06-06 00:12:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:12:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:13,542 INFO L225 Difference]: With dead ends: 16567 [2021-06-06 00:12:13,542 INFO L226 Difference]: Without dead ends: 16567 [2021-06-06 00:12:13,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:12:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-06-06 00:12:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-06-06 00:12:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-06-06 00:12:13,767 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-06-06 00:12:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:13,767 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-06-06 00:12:13,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-06-06 00:12:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:13,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:13,782 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:13,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:13,982 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-06-06 00:12:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:13,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906278081] [2021-06-06 00:12:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906278081] [2021-06-06 00:12:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906278081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115834710] [2021-06-06 00:12:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:14,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115834710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:14,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:14,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:12:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156558108] [2021-06-06 00:12:14,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:14,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:14,211 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:14,708 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-06-06 00:12:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:12:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:14,740 INFO L225 Difference]: With dead ends: 16375 [2021-06-06 00:12:14,741 INFO L226 Difference]: Without dead ends: 16331 [2021-06-06 00:12:14,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:12:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-06-06 00:12:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-06-06 00:12:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-06-06 00:12:14,995 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-06-06 00:12:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:14,995 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-06-06 00:12:14,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-06-06 00:12:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:15,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:15,018 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:15,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:15,219 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-06-06 00:12:15,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:15,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128764113] [2021-06-06 00:12:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:15,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:15,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128764113] [2021-06-06 00:12:15,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128764113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:15,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728371769] [2021-06-06 00:12:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:15,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:15,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:15,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:15,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:15,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728371769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:15,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:15,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:12:15,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283437085] [2021-06-06 00:12:15,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:12:15,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:12:15,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:12:15,341 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:15,775 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-06-06 00:12:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:12:15,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:15,810 INFO L225 Difference]: With dead ends: 18146 [2021-06-06 00:12:15,810 INFO L226 Difference]: Without dead ends: 18138 [2021-06-06 00:12:15,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:12:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-06-06 00:12:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-06-06 00:12:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-06-06 00:12:16,083 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-06-06 00:12:16,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:16,083 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-06-06 00:12:16,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-06-06 00:12:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:16,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:16,102 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:16,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:16,303 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:16,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-06-06 00:12:16,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:16,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35448894] [2021-06-06 00:12:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:16,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35448894] [2021-06-06 00:12:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35448894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790842030] [2021-06-06 00:12:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:16,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:12:16,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:16,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790842030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:16,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:16,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:12:16,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318236523] [2021-06-06 00:12:16,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:16,428 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:16,889 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-06-06 00:12:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:12:16,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:17,001 INFO L225 Difference]: With dead ends: 18024 [2021-06-06 00:12:17,001 INFO L226 Difference]: Without dead ends: 18012 [2021-06-06 00:12:17,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:12:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-06 00:12:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-06-06 00:12:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-06-06 00:12:17,312 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-06-06 00:12:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:17,312 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-06-06 00:12:17,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-06-06 00:12:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:17,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:17,333 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:17,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4018 [2021-06-06 00:12:17,534 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-06-06 00:12:17,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:17,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718005044] [2021-06-06 00:12:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:17,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:17,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718005044] [2021-06-06 00:12:17,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718005044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:17,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860723429] [2021-06-06 00:12:17,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:17,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860723429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:12:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405744451] [2021-06-06 00:12:17,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:12:17,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:12:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:12:17,707 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:18,706 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-06-06 00:12:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:12:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:18,758 INFO L225 Difference]: With dead ends: 24612 [2021-06-06 00:12:18,758 INFO L226 Difference]: Without dead ends: 24612 [2021-06-06 00:12:18,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 545.7ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:12:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-06-06 00:12:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-06-06 00:12:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-06-06 00:12:19,072 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-06-06 00:12:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:19,072 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-06-06 00:12:19,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-06-06 00:12:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:19,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:19,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:19,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:19,294 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-06 00:12:19,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:19,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042697536] [2021-06-06 00:12:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:19,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042697536] [2021-06-06 00:12:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042697536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339849597] [2021-06-06 00:12:19,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:19,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:12:19,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:19,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339849597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:19,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:19,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:12:19,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153352706] [2021-06-06 00:12:19,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:19,434 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:20,125 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-06-06 00:12:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:12:20,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:20,164 INFO L225 Difference]: With dead ends: 20270 [2021-06-06 00:12:20,164 INFO L226 Difference]: Without dead ends: 20257 [2021-06-06 00:12:20,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:12:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-06-06 00:12:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-06-06 00:12:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-06-06 00:12:20,558 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-06-06 00:12:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:20,558 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-06-06 00:12:20,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-06-06 00:12:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:20,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:20,579 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:20,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-06 00:12:20,780 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-06 00:12:20,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:20,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529251191] [2021-06-06 00:12:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:20,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529251191] [2021-06-06 00:12:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529251191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053814512] [2021-06-06 00:12:20,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:20,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:20,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053814512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:20,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:20,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:12:20,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130839448] [2021-06-06 00:12:20,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:20,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:20,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:20,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:20,916 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:21,669 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-06-06 00:12:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:12:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:21,708 INFO L225 Difference]: With dead ends: 20362 [2021-06-06 00:12:21,708 INFO L226 Difference]: Without dead ends: 20356 [2021-06-06 00:12:21,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:12:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-06 00:12:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-06-06 00:12:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-06-06 00:12:22,049 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-06-06 00:12:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:22,049 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-06-06 00:12:22,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-06-06 00:12:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:22,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:22,071 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:22,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-06 00:12:22,271 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-06 00:12:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:22,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018847248] [2021-06-06 00:12:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:22,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:22,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018847248] [2021-06-06 00:12:22,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018847248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:22,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63411426] [2021-06-06 00:12:22,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:22,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:22,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:22,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63411426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:22,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:22,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:12:22,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940097704] [2021-06-06 00:12:22,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:22,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:22,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:22,414 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:23,065 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-06-06 00:12:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:12:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:23,110 INFO L225 Difference]: With dead ends: 23158 [2021-06-06 00:12:23,111 INFO L226 Difference]: Without dead ends: 23145 [2021-06-06 00:12:23,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:12:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-06-06 00:12:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-06-06 00:12:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-06-06 00:12:23,451 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-06-06 00:12:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:23,451 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-06-06 00:12:23,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-06-06 00:12:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:23,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:23,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:23,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-06 00:12:23,673 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-06 00:12:23,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:23,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535124099] [2021-06-06 00:12:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:23,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535124099] [2021-06-06 00:12:23,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535124099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177170317] [2021-06-06 00:12:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:23,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:23,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:23,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:23,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177170317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:23,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:23,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:12:23,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288568915] [2021-06-06 00:12:23,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:23,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:23,805 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:24,563 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-06-06 00:12:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:12:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:24,617 INFO L225 Difference]: With dead ends: 24792 [2021-06-06 00:12:24,617 INFO L226 Difference]: Without dead ends: 24792 [2021-06-06 00:12:24,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:12:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-06-06 00:12:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-06-06 00:12:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-06-06 00:12:24,984 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-06-06 00:12:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:24,984 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-06-06 00:12:24,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-06-06 00:12:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:25,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:25,007 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:25,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-06 00:12:25,207 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-06-06 00:12:25,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:25,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162801617] [2021-06-06 00:12:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:25,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162801617] [2021-06-06 00:12:25,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162801617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581118500] [2021-06-06 00:12:25,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:25,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:12:25,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:25,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581118500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:25,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:25,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:12:25,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751611872] [2021-06-06 00:12:25,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:25,343 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:26,297 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-06-06 00:12:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:12:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:26,348 INFO L225 Difference]: With dead ends: 24486 [2021-06-06 00:12:26,348 INFO L226 Difference]: Without dead ends: 24482 [2021-06-06 00:12:26,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:12:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-06-06 00:12:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-06-06 00:12:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-06-06 00:12:26,717 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-06-06 00:12:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:26,717 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-06-06 00:12:26,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-06-06 00:12:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:26,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:26,739 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:26,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-06 00:12:26,943 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-06 00:12:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:26,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312571638] [2021-06-06 00:12:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:26,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:26,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312571638] [2021-06-06 00:12:26,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312571638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:26,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753639289] [2021-06-06 00:12:26,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:27,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:27,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753639289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:27,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:27,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:12:27,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378529075] [2021-06-06 00:12:27,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:27,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:27,071 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:27,792 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-06-06 00:12:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:12:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:27,836 INFO L225 Difference]: With dead ends: 21631 [2021-06-06 00:12:27,836 INFO L226 Difference]: Without dead ends: 21608 [2021-06-06 00:12:27,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:12:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-06-06 00:12:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-06-06 00:12:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-06-06 00:12:28,158 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-06-06 00:12:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:28,158 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-06-06 00:12:28,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-06-06 00:12:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:28,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:28,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:28,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:28,385 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-06 00:12:28,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:28,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033552647] [2021-06-06 00:12:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:28,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:28,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033552647] [2021-06-06 00:12:28,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033552647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:28,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589693416] [2021-06-06 00:12:28,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:28,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:12:28,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:28,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589693416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:28,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:28,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:12:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19540685] [2021-06-06 00:12:28,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:28,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:28,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:28,517 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:29,261 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-06-06 00:12:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:12:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:29,303 INFO L225 Difference]: With dead ends: 21728 [2021-06-06 00:12:29,304 INFO L226 Difference]: Without dead ends: 21728 [2021-06-06 00:12:29,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:12:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-06-06 00:12:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-06-06 00:12:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-06-06 00:12:29,632 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-06-06 00:12:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:29,633 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-06-06 00:12:29,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-06-06 00:12:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:29,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:29,654 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:29,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:29,855 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-06 00:12:29,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:29,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516635525] [2021-06-06 00:12:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:29,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:29,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516635525] [2021-06-06 00:12:29,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516635525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:29,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503804370] [2021-06-06 00:12:29,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:29,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:12:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:29,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503804370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:29,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:29,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:12:29,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226121789] [2021-06-06 00:12:29,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:29,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:29,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:29,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:29,993 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:30,669 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-06-06 00:12:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:12:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:30,719 INFO L225 Difference]: With dead ends: 24246 [2021-06-06 00:12:30,719 INFO L226 Difference]: Without dead ends: 24246 [2021-06-06 00:12:30,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:12:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-06-06 00:12:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-06-06 00:12:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-06-06 00:12:31,134 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-06-06 00:12:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:31,134 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-06-06 00:12:31,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-06-06 00:12:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:31,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:31,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:31,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:31,357 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-06 00:12:31,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:31,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143324139] [2021-06-06 00:12:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:31,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:31,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143324139] [2021-06-06 00:12:31,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143324139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:31,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213445103] [2021-06-06 00:12:31,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:31,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213445103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:31,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:31,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:12:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529437065] [2021-06-06 00:12:31,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:31,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:31,497 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:32,380 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-06-06 00:12:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:12:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:32,439 INFO L225 Difference]: With dead ends: 27385 [2021-06-06 00:12:32,439 INFO L226 Difference]: Without dead ends: 27385 [2021-06-06 00:12:32,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:12:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-06-06 00:12:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-06-06 00:12:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-06-06 00:12:32,801 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-06-06 00:12:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:32,801 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-06-06 00:12:32,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-06-06 00:12:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:32,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:32,825 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:33,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:33,025 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-06-06 00:12:33,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:33,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606867298] [2021-06-06 00:12:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:33,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:33,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606867298] [2021-06-06 00:12:33,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606867298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:33,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592532782] [2021-06-06 00:12:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:33,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:12:33,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:33,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:33,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592532782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:33,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:33,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:12:33,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318042129] [2021-06-06 00:12:33,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:33,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:33,191 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:34,822 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-06-06 00:12:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:12:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:34,908 INFO L225 Difference]: With dead ends: 42879 [2021-06-06 00:12:34,908 INFO L226 Difference]: Without dead ends: 42879 [2021-06-06 00:12:34,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 904.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:12:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-06-06 00:12:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-06-06 00:12:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-06-06 00:12:35,456 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-06-06 00:12:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:35,456 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-06-06 00:12:35,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-06-06 00:12:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:35,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:35,484 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:35,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:35,685 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-06-06 00:12:35,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:35,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729684934] [2021-06-06 00:12:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:35,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729684934] [2021-06-06 00:12:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729684934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726760096] [2021-06-06 00:12:35,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:35,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726760096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:35,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:35,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:12:35,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120983497] [2021-06-06 00:12:35,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:35,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:35,847 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:37,362 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-06-06 00:12:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:12:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:37,466 INFO L225 Difference]: With dead ends: 41907 [2021-06-06 00:12:37,466 INFO L226 Difference]: Without dead ends: 41907 [2021-06-06 00:12:37,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 916.6ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:12:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-06-06 00:12:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-06-06 00:12:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-06-06 00:12:38,261 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-06-06 00:12:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:38,261 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-06-06 00:12:38,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-06-06 00:12:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:38,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:38,291 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:38,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-06-06 00:12:38,491 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-06 00:12:38,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:38,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818464768] [2021-06-06 00:12:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:38,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:38,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818464768] [2021-06-06 00:12:38,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818464768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:38,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197983395] [2021-06-06 00:12:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:38,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:38,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:38,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197983395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:38,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:38,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:12:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402280260] [2021-06-06 00:12:38,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:12:38,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:12:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:12:38,632 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:38,966 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-06-06 00:12:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:12:38,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:39,048 INFO L225 Difference]: With dead ends: 28682 [2021-06-06 00:12:39,048 INFO L226 Difference]: Without dead ends: 28632 [2021-06-06 00:12:39,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:12:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-06-06 00:12:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-06-06 00:12:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-06-06 00:12:39,548 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-06-06 00:12:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:39,548 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-06-06 00:12:39,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-06-06 00:12:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:39,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:39,583 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:39,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-06 00:12:39,784 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-06 00:12:39,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:39,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037020044] [2021-06-06 00:12:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:39,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:39,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037020044] [2021-06-06 00:12:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037020044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:39,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572376205] [2021-06-06 00:12:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:39,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:12:39,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:12:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572376205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:39,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:39,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:12:39,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725804833] [2021-06-06 00:12:39,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:12:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:12:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:12:39,896 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:40,156 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-06-06 00:12:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:12:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:40,219 INFO L225 Difference]: With dead ends: 26308 [2021-06-06 00:12:40,219 INFO L226 Difference]: Without dead ends: 26308 [2021-06-06 00:12:40,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-06-06 00:12:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-06-06 00:12:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-06-06 00:12:40,687 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-06-06 00:12:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:40,687 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-06-06 00:12:40,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-06-06 00:12:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:40,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:40,722 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:40,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-06 00:12:40,923 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:40,923 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-06 00:12:40,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:40,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807716155] [2021-06-06 00:12:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:40,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:40,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807716155] [2021-06-06 00:12:40,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807716155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:40,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616544144] [2021-06-06 00:12:40,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:40,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:41,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616544144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:41,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:41,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:12:41,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258764644] [2021-06-06 00:12:41,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:12:41,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:12:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:12:41,113 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:42,065 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-06-06 00:12:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:12:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:42,143 INFO L225 Difference]: With dead ends: 35513 [2021-06-06 00:12:42,143 INFO L226 Difference]: Without dead ends: 35513 [2021-06-06 00:12:42,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:12:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-06-06 00:12:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-06-06 00:12:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-06-06 00:12:42,678 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-06-06 00:12:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:42,678 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-06-06 00:12:42,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-06-06 00:12:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:42,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:42,709 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:42,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-06-06 00:12:42,909 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-06 00:12:42,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:42,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183818382] [2021-06-06 00:12:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:42,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:42,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183818382] [2021-06-06 00:12:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183818382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:42,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472113888] [2021-06-06 00:12:42,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:42,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:12:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:42,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:43,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472113888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:43,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:43,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:12:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106053301] [2021-06-06 00:12:43,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:43,066 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:44,572 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-06-06 00:12:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:12:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:44,674 INFO L225 Difference]: With dead ends: 45671 [2021-06-06 00:12:44,674 INFO L226 Difference]: Without dead ends: 45671 [2021-06-06 00:12:44,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:12:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-06-06 00:12:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-06-06 00:12:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-06-06 00:12:45,496 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-06-06 00:12:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:45,496 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-06-06 00:12:45,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-06-06 00:12:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:45,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:45,529 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:45,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4034,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:45,730 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-06 00:12:45,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:45,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050595149] [2021-06-06 00:12:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:45,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:45,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050595149] [2021-06-06 00:12:45,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050595149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:45,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203888094] [2021-06-06 00:12:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:45,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:12:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:45,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203888094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:45,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:45,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:12:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092304708] [2021-06-06 00:12:45,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:12:45,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:12:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:12:45,885 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:47,300 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-06-06 00:12:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:12:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:47,403 INFO L225 Difference]: With dead ends: 45296 [2021-06-06 00:12:47,404 INFO L226 Difference]: Without dead ends: 45296 [2021-06-06 00:12:47,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:12:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-06-06 00:12:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-06-06 00:12:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-06-06 00:12:48,069 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-06-06 00:12:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:48,069 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-06-06 00:12:48,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-06-06 00:12:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:48,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:48,102 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:48,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-06 00:12:48,303 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-06 00:12:48,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:48,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093254808] [2021-06-06 00:12:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:48,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093254808] [2021-06-06 00:12:48,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093254808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899501242] [2021-06-06 00:12:48,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:12:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:12:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899501242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:48,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:48,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:12:48,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608056287] [2021-06-06 00:12:48,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:12:48,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:48,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:12:48,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:12:48,464 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:48,756 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-06-06 00:12:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:12:48,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:48,830 INFO L225 Difference]: With dead ends: 35247 [2021-06-06 00:12:48,830 INFO L226 Difference]: Without dead ends: 35230 [2021-06-06 00:12:48,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-06-06 00:12:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-06-06 00:12:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-06-06 00:12:49,456 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-06-06 00:12:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:49,456 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-06-06 00:12:49,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-06-06 00:12:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:49,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:49,488 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:49,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:49,688 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-06 00:12:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:49,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731746102] [2021-06-06 00:12:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:49,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:49,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731746102] [2021-06-06 00:12:49,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731746102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:49,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751780456] [2021-06-06 00:12:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:49,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:49,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:49,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:12:49,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:12:49,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751780456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:49,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:49,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:12:49,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140647000] [2021-06-06 00:12:49,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:12:49,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:12:49,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:12:49,805 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:50,097 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-06-06 00:12:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:12:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:50,183 INFO L225 Difference]: With dead ends: 37405 [2021-06-06 00:12:50,183 INFO L226 Difference]: Without dead ends: 37405 [2021-06-06 00:12:50,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:12:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-06-06 00:12:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-06-06 00:12:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-06-06 00:12:50,729 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-06-06 00:12:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:50,729 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-06-06 00:12:50,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-06-06 00:12:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:50,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:50,765 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:50,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:50,973 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-06 00:12:50,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:50,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527220691] [2021-06-06 00:12:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:51,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527220691] [2021-06-06 00:12:51,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527220691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547562416] [2021-06-06 00:12:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:51,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:12:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:51,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547562416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:51,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:51,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:12:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031005740] [2021-06-06 00:12:51,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:51,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:51,115 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:51,976 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-06-06 00:12:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:12:51,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:52,051 INFO L225 Difference]: With dead ends: 32629 [2021-06-06 00:12:52,051 INFO L226 Difference]: Without dead ends: 32629 [2021-06-06 00:12:52,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:12:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-06-06 00:12:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-06-06 00:12:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-06-06 00:12:52,587 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-06-06 00:12:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:52,587 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-06-06 00:12:52,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-06-06 00:12:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:52,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:52,620 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:52,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:52,821 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-06 00:12:52,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:52,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988474281] [2021-06-06 00:12:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:52,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:52,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988474281] [2021-06-06 00:12:52,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988474281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:52,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700536013] [2021-06-06 00:12:52,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:52,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:52,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:52,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:52,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:52,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700536013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:52,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:52,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:12:52,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411178740] [2021-06-06 00:12:52,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:52,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:52,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:52,959 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:53,965 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-06-06 00:12:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:12:53,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:54,043 INFO L225 Difference]: With dead ends: 34174 [2021-06-06 00:12:54,043 INFO L226 Difference]: Without dead ends: 34174 [2021-06-06 00:12:54,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:12:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-06-06 00:12:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-06-06 00:12:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-06-06 00:12:54,623 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-06-06 00:12:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:54,623 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-06-06 00:12:54,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-06-06 00:12:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:54,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:54,659 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:54,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:54,859 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:54,860 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-06 00:12:54,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:54,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38268479] [2021-06-06 00:12:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:54,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:54,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38268479] [2021-06-06 00:12:54,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38268479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:54,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822598231] [2021-06-06 00:12:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:54,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:12:54,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:55,144 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-06 00:12:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822598231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:55,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:55,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:12:55,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18225445] [2021-06-06 00:12:55,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:12:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:12:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:12:55,210 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:56,089 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-06-06 00:12:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:12:56,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:56,166 INFO L225 Difference]: With dead ends: 33276 [2021-06-06 00:12:56,166 INFO L226 Difference]: Without dead ends: 33272 [2021-06-06 00:12:56,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 653.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:12:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-06-06 00:12:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-06-06 00:12:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-06-06 00:12:56,732 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-06-06 00:12:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:56,732 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-06-06 00:12:56,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-06-06 00:12:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:56,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:56,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:56,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:56,968 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-06 00:12:56,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:56,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583458839] [2021-06-06 00:12:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:12:56,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583458839] [2021-06-06 00:12:56,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583458839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649098435] [2021-06-06 00:12:56,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:57,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:12:57,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:12:57,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:12:57,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649098435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:57,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:57,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:12:57,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619200220] [2021-06-06 00:12:57,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:12:57,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:12:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:12:57,092 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:57,393 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-06-06 00:12:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:12:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:57,465 INFO L225 Difference]: With dead ends: 29681 [2021-06-06 00:12:57,465 INFO L226 Difference]: Without dead ends: 29681 [2021-06-06 00:12:57,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-06-06 00:12:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-06-06 00:12:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-06-06 00:12:58,117 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-06-06 00:12:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:58,117 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-06-06 00:12:58,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-06-06 00:12:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:12:58,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:58,153 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:58,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-06-06 00:12:58,353 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-06 00:12:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:58,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815165044] [2021-06-06 00:12:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:58,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:58,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815165044] [2021-06-06 00:12:58,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815165044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:58,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173426121] [2021-06-06 00:12:58,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:58,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:12:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:12:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173426121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:58,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:58,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:12:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468400711] [2021-06-06 00:12:58,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:12:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:12:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:12:58,505 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:59,444 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-06-06 00:12:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:12:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:12:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:59,545 INFO L225 Difference]: With dead ends: 34438 [2021-06-06 00:12:59,545 INFO L226 Difference]: Without dead ends: 34438 [2021-06-06 00:12:59,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:12:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-06-06 00:13:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-06-06 00:13:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-06-06 00:13:00,443 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-06-06 00:13:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:00,443 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-06-06 00:13:00,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-06-06 00:13:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:00,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:00,479 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:00,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4042 [2021-06-06 00:13:00,679 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-06 00:13:00,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:00,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684229126] [2021-06-06 00:13:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:00,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:00,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684229126] [2021-06-06 00:13:00,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684229126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:00,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600779603] [2021-06-06 00:13:00,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:00,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:13:01,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600779603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:01,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:01,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:13:01,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574694146] [2021-06-06 00:13:01,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:01,000 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:01,729 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-06-06 00:13:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:13:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:01,809 INFO L225 Difference]: With dead ends: 32691 [2021-06-06 00:13:01,809 INFO L226 Difference]: Without dead ends: 32679 [2021-06-06 00:13:01,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-06-06 00:13:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-06-06 00:13:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-06-06 00:13:02,491 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-06-06 00:13:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:02,491 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-06-06 00:13:02,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-06-06 00:13:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:02,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:02,525 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:02,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-06 00:13:02,726 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-06 00:13:02,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:02,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828626388] [2021-06-06 00:13:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:02,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:02,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828626388] [2021-06-06 00:13:02,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828626388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:02,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762489964] [2021-06-06 00:13:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:02,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:13:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:13:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762489964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:02,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:02,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:13:02,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253782974] [2021-06-06 00:13:02,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:13:02,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:13:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:13:02,937 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:03,196 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-06-06 00:13:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:13:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:03,374 INFO L225 Difference]: With dead ends: 30159 [2021-06-06 00:13:03,374 INFO L226 Difference]: Without dead ends: 30159 [2021-06-06 00:13:03,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:13:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-06-06 00:13:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-06-06 00:13:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-06-06 00:13:03,963 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-06-06 00:13:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:03,964 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-06-06 00:13:03,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-06-06 00:13:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:04,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:04,150 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:04,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-06-06 00:13:04,351 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:04,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-06 00:13:04,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:04,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985993082] [2021-06-06 00:13:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:04,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:04,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985993082] [2021-06-06 00:13:04,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985993082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:04,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284809578] [2021-06-06 00:13:04,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:04,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:04,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:04,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:04,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:04,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284809578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:04,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:04,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:13:04,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839632975] [2021-06-06 00:13:04,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:04,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:04,518 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:05,357 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-06-06 00:13:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:13:05,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:05,437 INFO L225 Difference]: With dead ends: 34754 [2021-06-06 00:13:05,437 INFO L226 Difference]: Without dead ends: 34754 [2021-06-06 00:13:05,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:13:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-06-06 00:13:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-06-06 00:13:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-06-06 00:13:06,323 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-06-06 00:13:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:06,323 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-06-06 00:13:06,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-06-06 00:13:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:06,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:06,366 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:06,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-06-06 00:13:06,566 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-06 00:13:06,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:06,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940490042] [2021-06-06 00:13:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:06,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:06,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940490042] [2021-06-06 00:13:06,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940490042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:06,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589419927] [2021-06-06 00:13:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:06,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:13:06,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:06,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:06,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589419927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:06,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:06,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461187508] [2021-06-06 00:13:06,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:06,691 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:07,411 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-06-06 00:13:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:13:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:07,497 INFO L225 Difference]: With dead ends: 33849 [2021-06-06 00:13:07,497 INFO L226 Difference]: Without dead ends: 33841 [2021-06-06 00:13:07,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:13:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-06-06 00:13:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-06-06 00:13:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-06-06 00:13:08,176 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-06-06 00:13:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:08,176 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-06-06 00:13:08,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-06-06 00:13:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:08,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:08,222 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:08,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-06-06 00:13:08,422 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-06 00:13:08,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:08,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684251991] [2021-06-06 00:13:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:08,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:08,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684251991] [2021-06-06 00:13:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684251991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:08,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406781823] [2021-06-06 00:13:08,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:08,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:08,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:08,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:08,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406781823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:08,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:08,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:08,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814657757] [2021-06-06 00:13:08,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:08,725 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:09,574 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-06-06 00:13:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:13:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:09,664 INFO L225 Difference]: With dead ends: 35673 [2021-06-06 00:13:09,664 INFO L226 Difference]: Without dead ends: 35673 [2021-06-06 00:13:09,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:13:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-06-06 00:13:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-06-06 00:13:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-06-06 00:13:10,604 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-06-06 00:13:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:10,604 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-06-06 00:13:10,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-06-06 00:13:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:10,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:10,660 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:10,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:10,861 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-06 00:13:10,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:10,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310171640] [2021-06-06 00:13:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:10,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:10,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310171640] [2021-06-06 00:13:10,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310171640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:10,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956389770] [2021-06-06 00:13:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:10,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956389770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:10,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:10,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:13:10,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365895627] [2021-06-06 00:13:10,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:10,975 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:11,429 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-06-06 00:13:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:13:11,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:11,510 INFO L225 Difference]: With dead ends: 35179 [2021-06-06 00:13:11,511 INFO L226 Difference]: Without dead ends: 35166 [2021-06-06 00:13:11,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:13:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-06-06 00:13:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-06-06 00:13:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-06-06 00:13:12,498 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-06-06 00:13:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:12,499 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-06-06 00:13:12,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-06-06 00:13:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:12,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:12,581 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:12,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:12,782 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-06 00:13:12,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:12,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030367628] [2021-06-06 00:13:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:12,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:12,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030367628] [2021-06-06 00:13:12,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030367628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:12,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110845934] [2021-06-06 00:13:12,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:12,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:12,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:12,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110845934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:12,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:12,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:13:12,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467317091] [2021-06-06 00:13:12,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:12,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:12,904 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:13,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:13,329 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-06-06 00:13:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:13:13,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:13,424 INFO L225 Difference]: With dead ends: 36796 [2021-06-06 00:13:13,424 INFO L226 Difference]: Without dead ends: 36796 [2021-06-06 00:13:13,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:13:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-06-06 00:13:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-06-06 00:13:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-06-06 00:13:14,323 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-06-06 00:13:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:14,323 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-06-06 00:13:14,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-06-06 00:13:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:14,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:14,375 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:14,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:14,576 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-06 00:13:14,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:14,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310789244] [2021-06-06 00:13:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:14,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310789244] [2021-06-06 00:13:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310789244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802191099] [2021-06-06 00:13:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:14,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:13:14,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:14,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802191099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:14,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:14,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:14,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450280576] [2021-06-06 00:13:14,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:14,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:14,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:14,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:14,692 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:15,477 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-06-06 00:13:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:13:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:15,580 INFO L225 Difference]: With dead ends: 39856 [2021-06-06 00:13:15,580 INFO L226 Difference]: Without dead ends: 39848 [2021-06-06 00:13:15,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:13:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-06-06 00:13:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-06-06 00:13:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-06-06 00:13:16,459 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-06-06 00:13:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:16,460 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-06-06 00:13:16,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-06-06 00:13:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:16,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:16,511 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:16,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:16,711 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-06 00:13:16,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:16,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558380963] [2021-06-06 00:13:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:16,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:16,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558380963] [2021-06-06 00:13:16,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558380963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:16,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908092523] [2021-06-06 00:13:16,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:16,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:16,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908092523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:16,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:16,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:13:16,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587810262] [2021-06-06 00:13:16,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:16,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:16,821 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:17,488 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-06-06 00:13:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:13:17,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:17,585 INFO L225 Difference]: With dead ends: 36198 [2021-06-06 00:13:17,585 INFO L226 Difference]: Without dead ends: 36198 [2021-06-06 00:13:17,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:13:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-06-06 00:13:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-06-06 00:13:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-06-06 00:13:18,649 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-06-06 00:13:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:18,649 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-06-06 00:13:18,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-06-06 00:13:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:18,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:18,701 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:18,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-06 00:13:18,902 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-06 00:13:18,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:18,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782230930] [2021-06-06 00:13:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:18,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782230930] [2021-06-06 00:13:18,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782230930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139542904] [2021-06-06 00:13:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:18,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:13:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139542904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:19,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:19,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:19,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017007915] [2021-06-06 00:13:19,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:19,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:19,018 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:19,626 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-06-06 00:13:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:13:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:19,723 INFO L225 Difference]: With dead ends: 40833 [2021-06-06 00:13:19,723 INFO L226 Difference]: Without dead ends: 40809 [2021-06-06 00:13:19,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:13:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-06-06 00:13:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-06-06 00:13:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-06-06 00:13:20,669 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-06-06 00:13:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:20,669 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-06-06 00:13:20,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-06-06 00:13:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:20,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:20,726 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:20,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-06-06 00:13:20,926 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-06 00:13:20,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:20,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252637615] [2021-06-06 00:13:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:20,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252637615] [2021-06-06 00:13:20,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252637615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781507771] [2021-06-06 00:13:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:20,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:13:20,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:20,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:21,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781507771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:21,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:21,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-06 00:13:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392716996] [2021-06-06 00:13:21,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:21,045 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,258 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-06 00:13:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:21,733 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-06-06 00:13:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:13:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:21,814 INFO L225 Difference]: With dead ends: 36618 [2021-06-06 00:13:21,814 INFO L226 Difference]: Without dead ends: 36618 [2021-06-06 00:13:21,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:13:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-06-06 00:13:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-06-06 00:13:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-06-06 00:13:22,658 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-06-06 00:13:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:22,658 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-06-06 00:13:22,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-06-06 00:13:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:22,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:22,716 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4053,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:22,916 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-06 00:13:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207636] [2021-06-06 00:13:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:22,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:22,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207636] [2021-06-06 00:13:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:22,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692274747] [2021-06-06 00:13:22,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:22,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692274747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:23,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:23,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:13:23,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138880266] [2021-06-06 00:13:23,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:23,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:23,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:23,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:23,048 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:23,779 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-06-06 00:13:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:13:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:23,880 INFO L225 Difference]: With dead ends: 40756 [2021-06-06 00:13:23,880 INFO L226 Difference]: Without dead ends: 40716 [2021-06-06 00:13:23,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-06-06 00:13:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-06-06 00:13:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-06-06 00:13:24,891 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-06-06 00:13:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:24,891 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-06-06 00:13:24,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-06-06 00:13:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:25,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:25,208 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:25,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-06-06 00:13:25,421 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-06 00:13:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:25,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160750751] [2021-06-06 00:13:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:25,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160750751] [2021-06-06 00:13:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160750751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278777084] [2021-06-06 00:13:25,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:25,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:25,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:25,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278777084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:25,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:25,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045471712] [2021-06-06 00:13:25,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:25,584 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:26,880 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-06-06 00:13:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:13:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:27,318 INFO L225 Difference]: With dead ends: 76027 [2021-06-06 00:13:27,318 INFO L226 Difference]: Without dead ends: 76027 [2021-06-06 00:13:27,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:13:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-06-06 00:13:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-06-06 00:13:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-06-06 00:13:28,798 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-06-06 00:13:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:28,798 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-06-06 00:13:28,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-06-06 00:13:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:28,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:28,873 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:29,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-06-06 00:13:29,073 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-06 00:13:29,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:29,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090091285] [2021-06-06 00:13:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:29,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090091285] [2021-06-06 00:13:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090091285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252671964] [2021-06-06 00:13:29,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:29,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:13:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:29,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:29,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252671964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:29,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:29,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429669538] [2021-06-06 00:13:29,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:29,248 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:30,833 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-06-06 00:13:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:13:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:31,023 INFO L225 Difference]: With dead ends: 75388 [2021-06-06 00:13:31,023 INFO L226 Difference]: Without dead ends: 75388 [2021-06-06 00:13:31,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 724.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:13:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-06-06 00:13:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-06-06 00:13:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-06-06 00:13:32,722 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-06-06 00:13:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:32,722 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-06-06 00:13:32,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-06-06 00:13:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:32,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:32,787 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:32,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4056,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:32,988 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-06 00:13:32,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:32,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575815590] [2021-06-06 00:13:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:33,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:33,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575815590] [2021-06-06 00:13:33,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575815590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:33,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076414160] [2021-06-06 00:13:33,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:33,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:33,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:33,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076414160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:33,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:33,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:13:33,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172813145] [2021-06-06 00:13:33,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:33,136 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:34,351 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-06-06 00:13:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:13:34,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:34,849 INFO L225 Difference]: With dead ends: 69979 [2021-06-06 00:13:34,849 INFO L226 Difference]: Without dead ends: 69979 [2021-06-06 00:13:34,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:13:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-06-06 00:13:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-06-06 00:13:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-06-06 00:13:36,344 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-06-06 00:13:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:36,344 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-06-06 00:13:36,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-06-06 00:13:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:36,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:36,415 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:36,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-06 00:13:36,616 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-06 00:13:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:36,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881507262] [2021-06-06 00:13:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:36,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:36,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881507262] [2021-06-06 00:13:36,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881507262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:36,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826728122] [2021-06-06 00:13:36,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:36,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:13:36,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:36,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826728122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:36,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:36,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:13:36,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620494612] [2021-06-06 00:13:36,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:36,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:36,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:36,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:36,759 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:38,087 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-06-06 00:13:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:13:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:38,267 INFO L225 Difference]: With dead ends: 69094 [2021-06-06 00:13:38,267 INFO L226 Difference]: Without dead ends: 69086 [2021-06-06 00:13:38,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:13:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-06-06 00:13:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-06-06 00:13:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-06-06 00:13:39,745 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-06-06 00:13:39,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:39,745 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-06-06 00:13:39,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-06-06 00:13:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:39,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:39,811 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:40,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:40,011 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:40,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-06 00:13:40,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:40,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533586357] [2021-06-06 00:13:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:40,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:40,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533586357] [2021-06-06 00:13:40,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533586357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:40,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655469451] [2021-06-06 00:13:40,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:40,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655469451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:40,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:40,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746830399] [2021-06-06 00:13:40,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:40,178 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:41,697 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-06-06 00:13:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:13:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:41,891 INFO L225 Difference]: With dead ends: 68768 [2021-06-06 00:13:41,891 INFO L226 Difference]: Without dead ends: 68768 [2021-06-06 00:13:41,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:13:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-06-06 00:13:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-06-06 00:13:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-06-06 00:13:43,549 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-06-06 00:13:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:43,549 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-06-06 00:13:43,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-06-06 00:13:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:43,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:43,613 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:43,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:43,813 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:43,814 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-06 00:13:43,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:43,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426181767] [2021-06-06 00:13:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:43,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:43,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426181767] [2021-06-06 00:13:43,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426181767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:43,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541723315] [2021-06-06 00:13:43,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:43,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:43,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:43,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541723315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:43,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:43,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:43,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052712465] [2021-06-06 00:13:43,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:43,965 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:45,033 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-06-06 00:13:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:13:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:45,212 INFO L225 Difference]: With dead ends: 68557 [2021-06-06 00:13:45,212 INFO L226 Difference]: Without dead ends: 68549 [2021-06-06 00:13:45,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:13:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-06-06 00:13:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-06-06 00:13:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-06-06 00:13:46,898 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-06-06 00:13:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:46,898 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-06-06 00:13:46,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-06-06 00:13:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:46,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:46,972 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:47,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:47,172 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-06 00:13:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:47,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999031636] [2021-06-06 00:13:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:47,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:47,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999031636] [2021-06-06 00:13:47,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999031636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:47,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297017578] [2021-06-06 00:13:47,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:47,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:47,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:47,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297017578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:47,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:47,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:13:47,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594948991] [2021-06-06 00:13:47,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:47,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:47,325 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:48,569 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-06-06 00:13:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:13:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:49,106 INFO L225 Difference]: With dead ends: 67982 [2021-06-06 00:13:49,106 INFO L226 Difference]: Without dead ends: 67982 [2021-06-06 00:13:49,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:13:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-06-06 00:13:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-06-06 00:13:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-06-06 00:13:50,568 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-06-06 00:13:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:50,568 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-06-06 00:13:50,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-06-06 00:13:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:50,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:50,640 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:50,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-06-06 00:13:50,841 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-06 00:13:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:50,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230700576] [2021-06-06 00:13:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:50,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230700576] [2021-06-06 00:13:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230700576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973727418] [2021-06-06 00:13:50,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:50,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:13:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:50,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:50,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973727418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:50,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:13:50,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865893439] [2021-06-06 00:13:50,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:50,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:50,974 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:52,315 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-06-06 00:13:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:13:52,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:52,532 INFO L225 Difference]: With dead ends: 67509 [2021-06-06 00:13:52,532 INFO L226 Difference]: Without dead ends: 67501 [2021-06-06 00:13:52,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:13:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-06-06 00:13:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-06-06 00:13:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-06-06 00:13:54,118 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-06-06 00:13:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:54,118 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-06-06 00:13:54,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-06-06 00:13:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:54,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:54,186 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:54,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:54,386 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:54,386 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-06 00:13:54,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:54,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456631659] [2021-06-06 00:13:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:54,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:54,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456631659] [2021-06-06 00:13:54,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456631659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:54,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487150204] [2021-06-06 00:13:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:54,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:54,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:54,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487150204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:54,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:54,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:13:54,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646841849] [2021-06-06 00:13:54,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:54,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:54,522 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:55,694 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-06-06 00:13:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:13:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:55,877 INFO L225 Difference]: With dead ends: 65985 [2021-06-06 00:13:55,877 INFO L226 Difference]: Without dead ends: 65961 [2021-06-06 00:13:55,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:13:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-06-06 00:13:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-06-06 00:13:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-06-06 00:13:57,398 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-06-06 00:13:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-06-06 00:13:57,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-06-06 00:13:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:57,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:57,469 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:57,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4063,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:57,670 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-06 00:13:57,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:57,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829827508] [2021-06-06 00:13:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:57,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:57,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829827508] [2021-06-06 00:13:57,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829827508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:57,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975971984] [2021-06-06 00:13:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:57,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:13:57,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975971984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:57,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:57,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:57,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329112102] [2021-06-06 00:13:57,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:57,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:57,844 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:59,283 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-06-06 00:13:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:13:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:59,462 INFO L225 Difference]: With dead ends: 67202 [2021-06-06 00:13:59,462 INFO L226 Difference]: Without dead ends: 67202 [2021-06-06 00:13:59,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 891.0ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:13:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-06-06 00:14:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-06-06 00:14:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-06-06 00:14:00,995 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-06-06 00:14:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:00,996 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-06-06 00:14:00,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-06-06 00:14:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:01,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:01,058 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-06-06 00:14:01,261 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-06 00:14:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:01,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462899791] [2021-06-06 00:14:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:01,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462899791] [2021-06-06 00:14:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462899791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639090553] [2021-06-06 00:14:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:01,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:01,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639090553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:01,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:01,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800933513] [2021-06-06 00:14:01,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:01,412 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:02,716 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-06-06 00:14:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:14:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:02,892 INFO L225 Difference]: With dead ends: 66883 [2021-06-06 00:14:02,892 INFO L226 Difference]: Without dead ends: 66875 [2021-06-06 00:14:02,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:14:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-06-06 00:14:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-06-06 00:14:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-06-06 00:14:04,350 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-06-06 00:14:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:04,350 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-06-06 00:14:04,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-06-06 00:14:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:04,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:04,418 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:04,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-06 00:14:04,619 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-06 00:14:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:04,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33100620] [2021-06-06 00:14:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:04,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:04,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33100620] [2021-06-06 00:14:04,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33100620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:04,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003711453] [2021-06-06 00:14:04,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:04,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:04,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003711453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:04,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:04,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:14:04,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254421397] [2021-06-06 00:14:04,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:04,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:04,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:04,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:04,763 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:05,981 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-06-06 00:14:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:14:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:06,164 INFO L225 Difference]: With dead ends: 65614 [2021-06-06 00:14:06,164 INFO L226 Difference]: Without dead ends: 65590 [2021-06-06 00:14:06,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:14:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-06-06 00:14:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-06-06 00:14:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-06-06 00:14:07,808 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-06-06 00:14:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:07,808 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-06-06 00:14:07,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-06-06 00:14:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:07,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:07,882 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:08,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-06 00:14:08,082 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-06 00:14:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:08,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849816196] [2021-06-06 00:14:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:08,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:08,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849816196] [2021-06-06 00:14:08,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849816196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:08,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931291426] [2021-06-06 00:14:08,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:08,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931291426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:08,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:08,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:14:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118291514] [2021-06-06 00:14:08,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:08,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:08,222 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:10,079 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-06-06 00:14:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:14:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:10,273 INFO L225 Difference]: With dead ends: 68913 [2021-06-06 00:14:10,273 INFO L226 Difference]: Without dead ends: 68913 [2021-06-06 00:14:10,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:14:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-06-06 00:14:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-06-06 00:14:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-06-06 00:14:12,079 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-06-06 00:14:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:12,079 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-06-06 00:14:12,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-06-06 00:14:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:12,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:12,153 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:12,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-06 00:14:12,353 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:12,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-06 00:14:12,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:12,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086629748] [2021-06-06 00:14:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:12,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:12,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086629748] [2021-06-06 00:14:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086629748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:12,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120044459] [2021-06-06 00:14:12,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:12,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120044459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:12,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:12,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:14:12,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257463435] [2021-06-06 00:14:12,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:12,483 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:13,764 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-06-06 00:14:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:14:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:14,315 INFO L225 Difference]: With dead ends: 68143 [2021-06-06 00:14:14,316 INFO L226 Difference]: Without dead ends: 68135 [2021-06-06 00:14:14,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:14:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-06-06 00:14:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-06-06 00:14:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-06-06 00:14:15,913 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-06-06 00:14:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:15,913 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-06-06 00:14:15,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-06-06 00:14:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:15,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:15,992 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:16,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-06 00:14:16,192 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-06 00:14:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:16,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390759408] [2021-06-06 00:14:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:16,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390759408] [2021-06-06 00:14:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390759408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986169525] [2021-06-06 00:14:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:16,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:16,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:16,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:16,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986169525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:16,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:16,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:14:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915210230] [2021-06-06 00:14:16,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:16,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:16,326 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:17,826 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-06-06 00:14:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:14:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:18,061 INFO L225 Difference]: With dead ends: 66443 [2021-06-06 00:14:18,061 INFO L226 Difference]: Without dead ends: 66419 [2021-06-06 00:14:18,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 598.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:14:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-06-06 00:14:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-06-06 00:14:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:19,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-06-06 00:14:19,693 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-06-06 00:14:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:19,693 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-06-06 00:14:19,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-06-06 00:14:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:19,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:19,773 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:19,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:19,973 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-06 00:14:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:19,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438968357] [2021-06-06 00:14:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:20,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:20,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438968357] [2021-06-06 00:14:20,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438968357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:20,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130651001] [2021-06-06 00:14:20,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:20,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:14:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:20,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130651001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:20,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:20,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:14:20,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035869259] [2021-06-06 00:14:20,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:20,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:20,109 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:21,605 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-06-06 00:14:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:14:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:21,811 INFO L225 Difference]: With dead ends: 67813 [2021-06-06 00:14:21,812 INFO L226 Difference]: Without dead ends: 67773 [2021-06-06 00:14:21,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:14:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-06-06 00:14:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-06-06 00:14:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-06-06 00:14:23,433 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-06-06 00:14:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:23,433 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-06-06 00:14:23,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-06-06 00:14:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:23,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:23,505 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:23,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-06 00:14:23,709 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-06 00:14:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:23,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893975335] [2021-06-06 00:14:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893975335] [2021-06-06 00:14:23,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893975335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830021992] [2021-06-06 00:14:23,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:23,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:23,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830021992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:23,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:23,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:14:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495930836] [2021-06-06 00:14:23,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:14:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:14:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:14:23,878 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:25,633 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-06-06 00:14:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:14:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:25,817 INFO L225 Difference]: With dead ends: 66932 [2021-06-06 00:14:25,817 INFO L226 Difference]: Without dead ends: 66932 [2021-06-06 00:14:25,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:14:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-06-06 00:14:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-06-06 00:14:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-06-06 00:14:27,356 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-06-06 00:14:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:27,356 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-06-06 00:14:27,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-06-06 00:14:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:27,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:27,436 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:27,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:27,637 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-06 00:14:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:27,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852801184] [2021-06-06 00:14:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:27,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:27,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852801184] [2021-06-06 00:14:27,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852801184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:27,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124731496] [2021-06-06 00:14:27,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:27,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124731496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:27,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:27,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:14:27,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601100555] [2021-06-06 00:14:27,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:14:27,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:27,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:14:27,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:14:27,801 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:29,408 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-06-06 00:14:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:14:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:29,586 INFO L225 Difference]: With dead ends: 66428 [2021-06-06 00:14:29,586 INFO L226 Difference]: Without dead ends: 66420 [2021-06-06 00:14:29,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:14:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-06-06 00:14:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-06-06 00:14:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-06-06 00:14:31,101 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-06-06 00:14:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:31,101 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-06-06 00:14:31,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-06-06 00:14:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:31,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:31,177 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:31,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-06-06 00:14:31,377 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-06 00:14:31,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:31,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444512759] [2021-06-06 00:14:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:31,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:31,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444512759] [2021-06-06 00:14:31,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444512759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:31,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796068428] [2021-06-06 00:14:31,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:31,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:31,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796068428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:31,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:31,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:31,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731655148] [2021-06-06 00:14:31,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:31,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:31,880 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:33,009 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-06-06 00:14:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:14:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:33,183 INFO L225 Difference]: With dead ends: 65905 [2021-06-06 00:14:33,183 INFO L226 Difference]: Without dead ends: 65881 [2021-06-06 00:14:33,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 901.8ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:14:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-06-06 00:14:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-06-06 00:14:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-06-06 00:14:35,049 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-06-06 00:14:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:35,049 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-06-06 00:14:35,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-06-06 00:14:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:35,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:35,143 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:35,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:35,344 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:35,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-06 00:14:35,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:35,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101004255] [2021-06-06 00:14:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:35,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:35,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101004255] [2021-06-06 00:14:35,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101004255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:35,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406239973] [2021-06-06 00:14:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:35,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406239973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:35,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:35,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:14:35,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450939548] [2021-06-06 00:14:35,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:35,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:35,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:35,487 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:36,633 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-06-06 00:14:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:14:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:36,830 INFO L225 Difference]: With dead ends: 65687 [2021-06-06 00:14:36,830 INFO L226 Difference]: Without dead ends: 65647 [2021-06-06 00:14:36,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:14:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-06-06 00:14:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-06-06 00:14:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-06-06 00:14:38,977 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-06-06 00:14:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:38,977 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-06-06 00:14:38,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:38,978 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-06-06 00:14:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:39,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:39,057 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:39,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-06-06 00:14:39,258 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:39,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-06 00:14:39,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:39,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129213272] [2021-06-06 00:14:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:39,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129213272] [2021-06-06 00:14:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129213272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49042948] [2021-06-06 00:14:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:39,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:39,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:39,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49042948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:39,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:39,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:39,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564301455] [2021-06-06 00:14:39,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:39,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:39,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:39,427 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:40,746 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-06-06 00:14:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:14:40,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:41,295 INFO L225 Difference]: With dead ends: 79769 [2021-06-06 00:14:41,295 INFO L226 Difference]: Without dead ends: 79769 [2021-06-06 00:14:41,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 613.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:14:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-06-06 00:14:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-06-06 00:14:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-06-06 00:14:42,771 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-06-06 00:14:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:42,771 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-06-06 00:14:42,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-06-06 00:14:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:42,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:42,846 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:43,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-06 00:14:43,046 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-06 00:14:43,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:43,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184555156] [2021-06-06 00:14:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:43,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184555156] [2021-06-06 00:14:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184555156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868340928] [2021-06-06 00:14:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:43,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:14:43,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:43,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:43,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868340928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:43,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:43,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:43,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786334967] [2021-06-06 00:14:43,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:43,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:43,203 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:44,795 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-06-06 00:14:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:14:44,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:45,000 INFO L225 Difference]: With dead ends: 72910 [2021-06-06 00:14:45,000 INFO L226 Difference]: Without dead ends: 72910 [2021-06-06 00:14:45,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 558.0ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:14:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-06-06 00:14:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-06-06 00:14:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-06-06 00:14:46,624 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-06-06 00:14:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:46,624 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-06-06 00:14:46,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-06-06 00:14:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:46,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:46,703 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:46,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-06-06 00:14:46,904 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-06 00:14:46,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:46,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215072407] [2021-06-06 00:14:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:46,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:46,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215072407] [2021-06-06 00:14:46,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215072407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:46,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715585455] [2021-06-06 00:14:46,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:46,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:46,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:47,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715585455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:47,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:47,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:14:47,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956026889] [2021-06-06 00:14:47,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:14:47,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:47,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:14:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:14:47,083 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:48,474 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-06 00:14:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:48,998 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-06-06 00:14:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:14:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:49,199 INFO L225 Difference]: With dead ends: 73768 [2021-06-06 00:14:49,199 INFO L226 Difference]: Without dead ends: 73768 [2021-06-06 00:14:49,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1249.9ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:14:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-06-06 00:14:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-06-06 00:14:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-06-06 00:14:50,971 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-06-06 00:14:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:50,971 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-06-06 00:14:50,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-06-06 00:14:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:51,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:51,047 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:51,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-06 00:14:51,247 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:51,248 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-06 00:14:51,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:51,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671669670] [2021-06-06 00:14:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:51,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:51,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671669670] [2021-06-06 00:14:51,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671669670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:51,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109025647] [2021-06-06 00:14:51,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:51,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:51,707 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-06 00:14:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:51,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109025647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:51,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:51,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:14:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499005035] [2021-06-06 00:14:51,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:14:51,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:14:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:14:51,720 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:53,129 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-06-06 00:14:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:14:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:53,321 INFO L225 Difference]: With dead ends: 72980 [2021-06-06 00:14:53,321 INFO L226 Difference]: Without dead ends: 72976 [2021-06-06 00:14:53,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1040.8ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:14:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-06-06 00:14:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-06-06 00:14:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-06-06 00:14:55,184 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-06-06 00:14:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:55,184 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-06-06 00:14:55,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-06-06 00:14:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:55,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:55,262 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:55,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-06 00:14:55,462 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-06 00:14:55,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:55,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805605489] [2021-06-06 00:14:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:55,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:55,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805605489] [2021-06-06 00:14:55,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805605489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:55,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762267847] [2021-06-06 00:14:55,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:55,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:55,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762267847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:55,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:55,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319431462] [2021-06-06 00:14:55,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:55,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:55,617 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:56,581 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-06-06 00:14:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:14:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:56,758 INFO L225 Difference]: With dead ends: 66943 [2021-06-06 00:14:56,758 INFO L226 Difference]: Without dead ends: 66943 [2021-06-06 00:14:56,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:14:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-06-06 00:14:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-06-06 00:14:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-06-06 00:14:58,669 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-06-06 00:14:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:58,669 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-06-06 00:14:58,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-06-06 00:14:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:58,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:58,751 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:58,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-06 00:14:58,951 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-06 00:14:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:58,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937762275] [2021-06-06 00:14:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:58,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937762275] [2021-06-06 00:14:58,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937762275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180990284] [2021-06-06 00:14:58,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:59,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:59,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180990284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:59,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:59,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:59,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167356041] [2021-06-06 00:14:59,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:59,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:59,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:59,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:59,103 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:59,931 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-06-06 00:14:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:14:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:00,114 INFO L225 Difference]: With dead ends: 66257 [2021-06-06 00:15:00,115 INFO L226 Difference]: Without dead ends: 66245 [2021-06-06 00:15:00,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:15:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states. [2021-06-06 00:15:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66245 to 52008. [2021-06-06 00:15:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52008 states, 52007 states have (on average 3.889284134828004) internal successors, (202270), 52007 states have internal predecessors, (202270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52008 states to 52008 states and 202270 transitions. [2021-06-06 00:15:02,033 INFO L78 Accepts]: Start accepts. Automaton has 52008 states and 202270 transitions. Word has length 28 [2021-06-06 00:15:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:02,033 INFO L482 AbstractCegarLoop]: Abstraction has 52008 states and 202270 transitions. [2021-06-06 00:15:02,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 52008 states and 202270 transitions. [2021-06-06 00:15:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:02,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:02,124 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:02,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-06-06 00:15:02,324 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-06 00:15:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:02,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699702757] [2021-06-06 00:15:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:02,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699702757] [2021-06-06 00:15:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699702757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423434445] [2021-06-06 00:15:02,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:02,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:02,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:02,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423434445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:02,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:02,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:15:02,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630402400] [2021-06-06 00:15:02,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:02,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:02,486 INFO L87 Difference]: Start difference. First operand 52008 states and 202270 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:03,205 INFO L93 Difference]: Finished difference Result 56548 states and 217322 transitions. [2021-06-06 00:15:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:15:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:03,365 INFO L225 Difference]: With dead ends: 56548 [2021-06-06 00:15:03,365 INFO L226 Difference]: Without dead ends: 56548 [2021-06-06 00:15:03,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:15:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56548 states. [2021-06-06 00:15:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56548 to 52216. [2021-06-06 00:15:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52216 states, 52215 states have (on average 3.8870439528871015) internal successors, (202962), 52215 states have internal predecessors, (202962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52216 states to 52216 states and 202962 transitions. [2021-06-06 00:15:04,886 INFO L78 Accepts]: Start accepts. Automaton has 52216 states and 202962 transitions. Word has length 28 [2021-06-06 00:15:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:04,886 INFO L482 AbstractCegarLoop]: Abstraction has 52216 states and 202962 transitions. [2021-06-06 00:15:04,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 52216 states and 202962 transitions. [2021-06-06 00:15:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:04,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:04,983 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:05,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:05,184 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-06 00:15:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:05,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137604123] [2021-06-06 00:15:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:05,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:05,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137604123] [2021-06-06 00:15:05,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137604123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:05,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876366196] [2021-06-06 00:15:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:05,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:15:05,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:05,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876366196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:05,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:05,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:15:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543519170] [2021-06-06 00:15:05,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:15:05,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:15:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:15:05,626 INFO L87 Difference]: Start difference. First operand 52216 states and 202962 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:06,297 INFO L93 Difference]: Finished difference Result 56395 states and 216924 transitions. [2021-06-06 00:15:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:15:06,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:06,467 INFO L225 Difference]: With dead ends: 56395 [2021-06-06 00:15:06,467 INFO L226 Difference]: Without dead ends: 56391 [2021-06-06 00:15:06,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:15:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56391 states. [2021-06-06 00:15:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56391 to 52156. [2021-06-06 00:15:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52156 states, 52155 states have (on average 3.887834339948231) internal successors, (202770), 52155 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52156 states to 52156 states and 202770 transitions. [2021-06-06 00:15:07,932 INFO L78 Accepts]: Start accepts. Automaton has 52156 states and 202770 transitions. Word has length 28 [2021-06-06 00:15:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:07,932 INFO L482 AbstractCegarLoop]: Abstraction has 52156 states and 202770 transitions. [2021-06-06 00:15:07,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 52156 states and 202770 transitions. [2021-06-06 00:15:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:08,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:08,018 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:08,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-06-06 00:15:08,219 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:08,219 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 80 times [2021-06-06 00:15:08,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:08,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90264689] [2021-06-06 00:15:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:08,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:08,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90264689] [2021-06-06 00:15:08,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90264689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:08,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057728977] [2021-06-06 00:15:08,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:08,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:08,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:08,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057728977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:08,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:08,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:15:08,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133123354] [2021-06-06 00:15:08,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:08,375 INFO L87 Difference]: Start difference. First operand 52156 states and 202770 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:09,280 INFO L93 Difference]: Finished difference Result 56442 states and 217026 transitions. [2021-06-06 00:15:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:15:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:09,443 INFO L225 Difference]: With dead ends: 56442 [2021-06-06 00:15:09,443 INFO L226 Difference]: Without dead ends: 56442 [2021-06-06 00:15:09,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:15:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56442 states. [2021-06-06 00:15:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56442 to 52260. [2021-06-06 00:15:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52259 states have (on average 3.88629709715073) internal successors, (203094), 52259 states have internal predecessors, (203094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 203094 transitions. [2021-06-06 00:15:10,918 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 203094 transitions. Word has length 28 [2021-06-06 00:15:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:10,918 INFO L482 AbstractCegarLoop]: Abstraction has 52260 states and 203094 transitions. [2021-06-06 00:15:10,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 203094 transitions. [2021-06-06 00:15:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:11,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:11,006 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:11,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:11,209 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 81 times [2021-06-06 00:15:11,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:11,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141090176] [2021-06-06 00:15:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:11,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:11,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141090176] [2021-06-06 00:15:11,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141090176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:11,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727885355] [2021-06-06 00:15:11,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:11,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:11,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727885355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:11,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:11,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-06 00:15:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288466349] [2021-06-06 00:15:11,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:15:11,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:15:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:15:11,323 INFO L87 Difference]: Start difference. First operand 52260 states and 203094 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:11,817 INFO L93 Difference]: Finished difference Result 56568 states and 217524 transitions. [2021-06-06 00:15:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:15:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:11,975 INFO L225 Difference]: With dead ends: 56568 [2021-06-06 00:15:11,976 INFO L226 Difference]: Without dead ends: 56556 [2021-06-06 00:15:11,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:15:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56556 states. [2021-06-06 00:15:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56556 to 52394. [2021-06-06 00:15:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8846601645257954) internal successors, (203529), 52393 states have internal predecessors, (203529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203529 transitions. [2021-06-06 00:15:13,985 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203529 transitions. Word has length 28 [2021-06-06 00:15:13,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:13,985 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203529 transitions. [2021-06-06 00:15:13,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203529 transitions. [2021-06-06 00:15:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:14,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:14,085 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:14,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-06-06 00:15:14,286 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 82 times [2021-06-06 00:15:14,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:14,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687812732] [2021-06-06 00:15:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:14,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687812732] [2021-06-06 00:15:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687812732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47857511] [2021-06-06 00:15:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:14,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:14,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:14,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47857511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:14,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:14,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:15:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817555918] [2021-06-06 00:15:14,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:14,403 INFO L87 Difference]: Start difference. First operand 52394 states and 203529 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:14,949 INFO L93 Difference]: Finished difference Result 56532 states and 217440 transitions. [2021-06-06 00:15:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:15:14,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:15,115 INFO L225 Difference]: With dead ends: 56532 [2021-06-06 00:15:15,115 INFO L226 Difference]: Without dead ends: 56512 [2021-06-06 00:15:15,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:15:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2021-06-06 00:15:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 52394. [2021-06-06 00:15:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8845838184490296) internal successors, (203525), 52393 states have internal predecessors, (203525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203525 transitions. [2021-06-06 00:15:16,610 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203525 transitions. Word has length 28 [2021-06-06 00:15:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:16,610 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203525 transitions. [2021-06-06 00:15:16,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203525 transitions. [2021-06-06 00:15:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:16,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:16,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:16,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-06-06 00:15:16,893 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-06 00:15:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:16,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961921547] [2021-06-06 00:15:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:16,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:16,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961921547] [2021-06-06 00:15:16,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961921547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:16,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211712759] [2021-06-06 00:15:16,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:16,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:15:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:17,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211712759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:17,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:17,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:15:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381238224] [2021-06-06 00:15:17,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:17,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:17,015 INFO L87 Difference]: Start difference. First operand 52394 states and 203525 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:17,832 INFO L93 Difference]: Finished difference Result 57355 states and 221090 transitions. [2021-06-06 00:15:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:15:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:18,010 INFO L225 Difference]: With dead ends: 57355 [2021-06-06 00:15:18,010 INFO L226 Difference]: Without dead ends: 57342 [2021-06-06 00:15:18,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:15:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57342 states. [2021-06-06 00:15:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57342 to 55127. [2021-06-06 00:15:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55127 states, 55126 states have (on average 3.891321699379603) internal successors, (214513), 55126 states have internal predecessors, (214513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55127 states to 55127 states and 214513 transitions. [2021-06-06 00:15:19,483 INFO L78 Accepts]: Start accepts. Automaton has 55127 states and 214513 transitions. Word has length 28 [2021-06-06 00:15:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:19,483 INFO L482 AbstractCegarLoop]: Abstraction has 55127 states and 214513 transitions. [2021-06-06 00:15:19,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 55127 states and 214513 transitions. [2021-06-06 00:15:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:19,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:19,589 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:19,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-06-06 00:15:19,789 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:19,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-06 00:15:19,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:19,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186916186] [2021-06-06 00:15:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:19,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:19,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186916186] [2021-06-06 00:15:19,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186916186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:19,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524508663] [2021-06-06 00:15:19,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:19,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524508663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:19,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:19,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:15:19,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659190556] [2021-06-06 00:15:19,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:19,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:19,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:19,916 INFO L87 Difference]: Start difference. First operand 55127 states and 214513 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:20,487 INFO L93 Difference]: Finished difference Result 61086 states and 233937 transitions. [2021-06-06 00:15:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:15:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:20,675 INFO L225 Difference]: With dead ends: 61086 [2021-06-06 00:15:20,675 INFO L226 Difference]: Without dead ends: 61086 [2021-06-06 00:15:20,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:15:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-06-06 00:15:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 48711. [2021-06-06 00:15:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48711 states, 48710 states have (on average 3.8803736399096693) internal successors, (189013), 48710 states have internal predecessors, (189013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48711 states to 48711 states and 189013 transitions. [2021-06-06 00:15:22,605 INFO L78 Accepts]: Start accepts. Automaton has 48711 states and 189013 transitions. Word has length 28 [2021-06-06 00:15:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:22,605 INFO L482 AbstractCegarLoop]: Abstraction has 48711 states and 189013 transitions. [2021-06-06 00:15:22,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 48711 states and 189013 transitions. [2021-06-06 00:15:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:22,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:22,682 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:22,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-06-06 00:15:22,883 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-06 00:15:22,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:22,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188101299] [2021-06-06 00:15:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:22,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:22,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188101299] [2021-06-06 00:15:22,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188101299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:22,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439664251] [2021-06-06 00:15:22,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:22,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:22,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439664251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:23,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:23,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:15:23,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931177734] [2021-06-06 00:15:23,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:23,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:23,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:23,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:23,011 INFO L87 Difference]: Start difference. First operand 48711 states and 189013 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:23,592 INFO L93 Difference]: Finished difference Result 53676 states and 205772 transitions. [2021-06-06 00:15:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:15:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:23,728 INFO L225 Difference]: With dead ends: 53676 [2021-06-06 00:15:23,728 INFO L226 Difference]: Without dead ends: 53676 [2021-06-06 00:15:23,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:15:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53676 states. [2021-06-06 00:15:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53676 to 49544. [2021-06-06 00:15:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49544 states, 49543 states have (on average 3.878872898290374) internal successors, (192171), 49543 states have internal predecessors, (192171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49544 states to 49544 states and 192171 transitions. [2021-06-06 00:15:25,081 INFO L78 Accepts]: Start accepts. Automaton has 49544 states and 192171 transitions. Word has length 28 [2021-06-06 00:15:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:25,081 INFO L482 AbstractCegarLoop]: Abstraction has 49544 states and 192171 transitions. [2021-06-06 00:15:25,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49544 states and 192171 transitions. [2021-06-06 00:15:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:25,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:25,160 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:25,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-06-06 00:15:25,361 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:25,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:25,362 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-06 00:15:25,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:25,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594607577] [2021-06-06 00:15:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:25,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:25,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594607577] [2021-06-06 00:15:25,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594607577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:25,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993708346] [2021-06-06 00:15:25,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:25,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:25,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:15:25,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:25,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993708346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:25,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:25,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-06 00:15:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119243525] [2021-06-06 00:15:25,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:15:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:15:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:15:25,536 INFO L87 Difference]: Start difference. First operand 49544 states and 192171 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:26,472 INFO L93 Difference]: Finished difference Result 52408 states and 201958 transitions. [2021-06-06 00:15:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:15:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:26,620 INFO L225 Difference]: With dead ends: 52408 [2021-06-06 00:15:26,620 INFO L226 Difference]: Without dead ends: 52408 [2021-06-06 00:15:26,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:15:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52408 states. [2021-06-06 00:15:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52408 to 49552. [2021-06-06 00:15:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49552 states, 49551 states have (on average 3.8787310044196888) internal successors, (192195), 49551 states have internal predecessors, (192195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49552 states to 49552 states and 192195 transitions. [2021-06-06 00:15:28,024 INFO L78 Accepts]: Start accepts. Automaton has 49552 states and 192195 transitions. Word has length 28 [2021-06-06 00:15:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:28,024 INFO L482 AbstractCegarLoop]: Abstraction has 49552 states and 192195 transitions. [2021-06-06 00:15:28,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 49552 states and 192195 transitions. [2021-06-06 00:15:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:28,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:28,104 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:28,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4089,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:28,305 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-06 00:15:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:28,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948567300] [2021-06-06 00:15:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:28,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:28,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948567300] [2021-06-06 00:15:28,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948567300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:28,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740977223] [2021-06-06 00:15:28,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:28,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:28,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740977223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:28,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:28,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:15:28,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697061864] [2021-06-06 00:15:28,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:28,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:28,438 INFO L87 Difference]: Start difference. First operand 49552 states and 192195 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:28,906 INFO L93 Difference]: Finished difference Result 51100 states and 197405 transitions. [2021-06-06 00:15:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:15:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:29,048 INFO L225 Difference]: With dead ends: 51100 [2021-06-06 00:15:29,048 INFO L226 Difference]: Without dead ends: 51100 [2021-06-06 00:15:29,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:15:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51100 states. [2021-06-06 00:15:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51100 to 49446. [2021-06-06 00:15:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.878471028415411) internal successors, (191771), 49445 states have internal predecessors, (191771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 191771 transitions. [2021-06-06 00:15:30,405 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 191771 transitions. Word has length 28 [2021-06-06 00:15:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:30,406 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 191771 transitions. [2021-06-06 00:15:30,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 191771 transitions. [2021-06-06 00:15:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:15:30,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:30,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:30,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:30,687 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-06 00:15:30,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:30,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268691513] [2021-06-06 00:15:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:30,926 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-06 00:15:31,085 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-06 00:15:31,606 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-06 00:15:31,728 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-06 00:15:31,851 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-06 00:15:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:32,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:32,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268691513] [2021-06-06 00:15:32,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268691513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:32,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012365104] [2021-06-06 00:15:32,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:32,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:15:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:15:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:32,433 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-06 00:15:32,672 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:15:33,261 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2021-06-06 00:15:33,528 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:15:33,753 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-06 00:15:33,971 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-06-06 00:15:34,149 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_558, A, v_prenex_560, v_prenex_562, v_prenex_564, v_prenex_566], 6=[v_prenex_554, v_prenex_556]} [2021-06-06 00:15:34,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:34,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-06-06 00:15:34,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:34,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:15:34,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:34,752 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2021-06-06 00:15:34,752 INFO L628 ElimStorePlain]: treesize reduction 280, result has 60.3 percent of original size [2021-06-06 00:15:34,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:34,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:15:34,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:34,973 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:15:34,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:34,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:34,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:34,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:15:34,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,182 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:15:35,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:35,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:15:35,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:35,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:15:35,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,380 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-06 00:15:35,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:35,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:35,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,536 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:15:35,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:35,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:35,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:35,546 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,679 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:15:35,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:35,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:15:35,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,822 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-06 00:15:35,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:35,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:35,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-06 00:15:35,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:35,961 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:15:35,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:35,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-06 00:15:35,966 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:757, output treesize:114 [2021-06-06 00:15:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:36,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012365104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:36,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:36,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:15:36,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042505811] [2021-06-06 00:15:36,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:15:36,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:15:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:15:36,068 INFO L87 Difference]: Start difference. First operand 49446 states and 191771 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:36,528 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2021-06-06 00:15:36,922 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2021-06-06 00:15:37,081 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-06 00:15:37,592 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 79 [2021-06-06 00:15:37,944 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-06-06 00:15:38,327 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-06-06 00:15:38,917 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2021-06-06 00:15:39,588 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 84 [2021-06-06 00:15:39,854 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-06 00:15:40,057 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-06 00:15:40,678 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 96 [2021-06-06 00:15:41,172 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-06-06 00:15:41,692 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 112 [2021-06-06 00:15:42,786 WARN L205 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 153 [2021-06-06 00:15:43,253 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-06-06 00:15:43,686 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-06-06 00:15:44,072 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-06 00:15:44,604 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-06-06 00:15:44,996 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-06 00:15:45,341 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2021-06-06 00:15:45,807 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2021-06-06 00:15:45,995 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-06-06 00:15:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:46,232 INFO L93 Difference]: Finished difference Result 57718 states and 215952 transitions. [2021-06-06 00:15:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:15:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:15:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:46,393 INFO L225 Difference]: With dead ends: 57718 [2021-06-06 00:15:46,393 INFO L226 Difference]: Without dead ends: 57628 [2021-06-06 00:15:46,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 11500.1ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:15:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57628 states. [2021-06-06 00:15:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57628 to 49581. [2021-06-06 00:15:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49581 states, 49580 states have (on average 3.8776926179911255) internal successors, (192256), 49580 states have internal predecessors, (192256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49581 states to 49581 states and 192256 transitions. [2021-06-06 00:15:47,832 INFO L78 Accepts]: Start accepts. Automaton has 49581 states and 192256 transitions. Word has length 30 [2021-06-06 00:15:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:47,832 INFO L482 AbstractCegarLoop]: Abstraction has 49581 states and 192256 transitions. [2021-06-06 00:15:47,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49581 states and 192256 transitions. [2021-06-06 00:15:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:15:47,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:47,911 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:48,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:48,112 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-06 00:15:48,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:48,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627885922] [2021-06-06 00:15:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:48,456 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-06 00:15:48,642 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-06 00:15:48,824 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-06 00:15:48,950 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-06 00:15:49,074 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-06 00:15:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:49,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:49,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627885922] [2021-06-06 00:15:49,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627885922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:49,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779595563] [2021-06-06 00:15:49,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:49,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:15:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-06 00:15:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:49,590 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-06 00:15:49,833 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:15:50,595 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-06-06 00:15:50,828 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:15:51,627 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 131 [2021-06-06 00:15:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:51,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:51,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:51,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:52,159 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-06-06 00:15:52,160 INFO L628 ElimStorePlain]: treesize reduction 86, result has 82.7 percent of original size [2021-06-06 00:15:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:52,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:15:52,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:52,364 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-06 00:15:52,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:52,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:15:52,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:52,550 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:15:52,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:52,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:52,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:52,725 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-06 00:15:52,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:15:52,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:52,893 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:15:52,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:52,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:15:52,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:53,052 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-06 00:15:53,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:53,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:53,198 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:15:53,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:53,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:15:53,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:53,333 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-06 00:15:53,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:53,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:53,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:15:53,346 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:53,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:15:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:15:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:15:53,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:15:53,462 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-06 00:15:53,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:15:53,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 9 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-06 00:15:53,468 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 27 variables, input treesize:525, output treesize:114 [2021-06-06 00:15:53,628 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-06-06 00:15:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:53,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779595563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:53,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:53,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:15:53,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765596028] [2021-06-06 00:15:53,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:15:53,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:15:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:15:53,647 INFO L87 Difference]: Start difference. First operand 49581 states and 192256 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:54,140 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 44 [2021-06-06 00:15:54,685 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-06 00:15:54,998 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 70 [2021-06-06 00:15:55,281 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2021-06-06 00:15:55,411 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-06-06 00:15:56,231 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2021-06-06 00:15:56,989 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-06-06 00:15:57,148 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-06 00:15:57,992 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-06 00:15:58,433 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:15:58,957 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 102 [2021-06-06 00:15:59,199 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-06 00:15:59,538 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:15:59,908 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-06 00:16:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:00,278 INFO L93 Difference]: Finished difference Result 52816 states and 201749 transitions. [2021-06-06 00:16:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:16:00,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:16:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:00,425 INFO L225 Difference]: With dead ends: 52816 [2021-06-06 00:16:00,425 INFO L226 Difference]: Without dead ends: 52771 [2021-06-06 00:16:00,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 8257.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:16:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52771 states. [2021-06-06 00:16:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52771 to 49618. [2021-06-06 00:16:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49618 states, 49617 states have (on average 3.877360582058569) internal successors, (192383), 49617 states have internal predecessors, (192383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49618 states to 49618 states and 192383 transitions. [2021-06-06 00:16:01,629 INFO L78 Accepts]: Start accepts. Automaton has 49618 states and 192383 transitions. Word has length 30 [2021-06-06 00:16:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:01,629 INFO L482 AbstractCegarLoop]: Abstraction has 49618 states and 192383 transitions. [2021-06-06 00:16:01,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 49618 states and 192383 transitions. [2021-06-06 00:16:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:16:01,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:01,708 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:01,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-06-06 00:16:01,910 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-06 00:16:01,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:01,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239183762] [2021-06-06 00:16:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:02,374 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-06-06 00:16:02,636 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2021-06-06 00:16:02,924 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-06-06 00:16:03,350 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-06-06 00:16:03,634 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-06-06 00:16:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:03,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:03,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239183762] [2021-06-06 00:16:03,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239183762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:03,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818825078] [2021-06-06 00:16:03,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:03,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:16:03,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:04,706 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-06 00:16:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-06-06 00:16:05,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:16:05,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-06 00:16:05,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-06-06 00:16:05,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:16:05,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:05,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-06-06 00:16:05,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-06 00:16:05,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,364 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:05,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:16:05,397 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-06 00:16:05,413 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:05,429 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-06 00:16:05,445 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,459 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-06 00:16:05,474 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:16:05,489 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:16:05,504 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-06 00:16:05,521 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:16:05,537 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,553 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-06 00:16:05,569 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-06-06 00:16:05,585 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-06 00:16:05,601 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-06-06 00:16:05,618 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-06 00:16:05,635 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-06 00:16:05,651 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-06 00:16:05,668 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,684 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-06 00:16:05,699 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:16:05,715 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:16:05,750 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2021-06-06 00:16:05,773 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,797 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:16:05,818 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-06-06 00:16:05,841 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:05,864 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-06 00:16:05,886 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:16:05,907 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:05,924 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:05,942 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:05,958 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:16:05,974 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:16:05,989 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:05,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:16:06,005 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:16:06,020 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2021-06-06 00:16:06,036 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-06-06 00:16:06,052 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:06,068 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:16:06,083 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-06 00:16:06,100 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 25 [2021-06-06 00:16:06,123 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:16:06,146 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:06,167 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:06,188 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:16:06,209 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:16:06,230 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:16:06,251 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:16:06,271 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:16:06,289 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:16:06,305 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:16:06,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:16:06,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-06-06 00:16:06,316 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-06 00:16:06,451 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-06-06 00:16:06,451 INFO L628 ElimStorePlain]: treesize reduction 179, result has 29.5 percent of original size [2021-06-06 00:16:06,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:16:06,453 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-06-06 00:16:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:06,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818825078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:06,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:06,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:16:06,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786176374] [2021-06-06 00:16:06,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:16:06,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:06,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:16:06,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:16:06,522 INFO L87 Difference]: Start difference. First operand 49618 states and 192383 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:07,823 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 81 [2021-06-06 00:16:08,261 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 73 [2021-06-06 00:16:08,414 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-06-06 00:16:08,775 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 80 [2021-06-06 00:16:09,534 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2021-06-06 00:16:10,089 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 106 [2021-06-06 00:16:10,422 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 89 [2021-06-06 00:16:10,632 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:16:10,914 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 85 Received shutdown request... [2021-06-06 00:16:10,996 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-06 00:16:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:16:11,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:11,197 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:16:11,199 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:16:11,200 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:16:11,200 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:16:11 BasicIcfg [2021-06-06 00:16:11,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:16:11,201 INFO L168 Benchmark]: Toolchain (without parser) took 756714.63 ms. Allocated memory was 377.5 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 356.3 MB in the beginning and 10.6 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.2 GB. Max. memory is 16.0 GB. [2021-06-06 00:16:11,201 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 377.5 MB. Free memory is still 357.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:16:11,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 377.5 MB. Free memory was 356.3 MB in the beginning and 354.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:16:11,201 INFO L168 Benchmark]: Boogie Preprocessor took 13.59 ms. Allocated memory is still 377.5 MB. Free memory was 354.8 MB in the beginning and 353.9 MB in the end (delta: 908.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:16:11,201 INFO L168 Benchmark]: RCFGBuilder took 322.32 ms. Allocated memory is still 377.5 MB. Free memory was 353.7 MB in the beginning and 340.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-06 00:16:11,201 INFO L168 Benchmark]: TraceAbstraction took 756334.59 ms. Allocated memory was 377.5 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 340.3 MB in the beginning and 10.6 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:16:11,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 377.5 MB. Free memory is still 357.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 377.5 MB. Free memory was 356.3 MB in the beginning and 354.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.59 ms. Allocated memory is still 377.5 MB. Free memory was 354.8 MB in the beginning and 353.9 MB in the end (delta: 908.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 322.32 ms. Allocated memory is still 377.5 MB. Free memory was 353.7 MB in the beginning and 340.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 756334.59 ms. Allocated memory was 377.5 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 340.3 MB in the beginning and 10.6 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (49618states) and FLOYD_HOARE automaton (currently 31 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 102 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 756191.8ms, OverallIterations: 260, TraceHistogramMax: 3, EmptinessCheckTime: 5436.4ms, AutomataDifference: 389384.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11465 SDtfs, 72813 SDslu, 88257 SDs, 0 SdLazy, 140762 SolverSat, 13246 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78653.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16678 GetRequests, 5481 SyntacticMatches, 243 SemanticMatches, 10953 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184340 ImplicationChecksByTransitivity, 348407.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55127occurred in iteration=253, InterpolantAutomatonStates: 9687, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95211.8ms AutomataMinimizationTime, 259 MinimizatonAttempts, 1317537 StatesRemovedByMinimization, 259 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 825.7ms SsaConstructionTime, 2707.4ms SatisfiabilityAnalysisTime, 204851.6ms InterpolantComputationTime, 13806 NumberOfCodeBlocks, 13806 NumberOfCodeBlocksAsserted, 898 NumberOfCheckSat, 13289 ConstructedInterpolants, 168 QuantifiedInterpolants, 263303 SizeOfPredicates, 1143 NumberOfNonLiveVariables, 17956 ConjunctsInSsa, 3855 ConjunctsInUnsatCore, 517 InterpolantComputations, 3 PerfectInterpolantSequences, 1026/4378 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown