/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/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:41:47,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:41:47,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:41:47,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:41:47,866 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 [2021-06-05 05:41:47,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:41:47,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:41:47,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:41:47,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:41:47,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:41:47,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:41:47,904 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:41:47,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:41:47,904 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:41:47,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:41:47,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:41:47,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:41:47,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:41:47,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:41:47,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:41:47,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:41:47,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:41:47,907 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:41:47,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:41:47,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:41:48,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:41:48,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:41:48,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:41:48,195 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:41:48,197 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:41:48,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2021-06-05 05:41:48,198 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2021-06-05 05:41:48,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:41:48,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:41:48,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:41:48,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:41:48,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:41:48,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:41:48,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:41:48,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:41:48,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:41:48,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/1) ... [2021-06-05 05:41:48,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:41:48,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:41:48,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:41:48,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:41:48,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (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 [2021-06-05 05:41:48,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:41:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:41:48,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:41:48,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:41:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:41:48,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:41:48,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:41:48,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:41:48,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:41:48,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:41:48,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:41:48,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:41:48,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:41:48,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:41:48,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:41:48,336 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:41:48,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:41:48,525 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:41:48,527 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:41:48 BoogieIcfgContainer [2021-06-05 05:41:48,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:41:48,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:41:48,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:41:48,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:41:48,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:41:48" (1/2) ... [2021-06-05 05:41:48,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1727c3 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:41:48, skipping insertion in model container [2021-06-05 05:41:48,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:41:48" (2/2) ... [2021-06-05 05:41:48,532 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2021-06-05 05:41:48,537 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:41:48,537 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:41:48,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:41:48,538 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:41:48,612 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 05:41:48,635 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 05:41:48,657 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:41:48,657 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:41:48,657 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:41:48,657 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:41:48,657 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:41:48,657 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:41:48,658 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:41:48,658 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:41:48,668 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-06-05 05:41:48,741 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:41:48,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:48,769 INFO L521 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] [2021-06-05 05:41:48,769 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1590059923, now seen corresponding path program 1 times [2021-06-05 05:41:48,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:48,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343808370] [2021-06-05 05:41:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:48,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:48,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343808370] [2021-06-05 05:41:48,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343808370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:41:48,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:41:48,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:41:48,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315646761] [2021-06-05 05:41:48,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:41:48,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:41:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:41:48,967 INFO L87 Difference]: Start difference. First operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:49,021 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-06-05 05:41:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:41:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:41:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:49,039 INFO L225 Difference]: With dead ends: 912 [2021-06-05 05:41:49,039 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 05:41:49,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:41:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 05:41:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-06-05 05:41:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-06-05 05:41:49,115 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-06-05 05:41:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:49,121 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-06-05 05:41:49,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-06-05 05:41:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:41:49,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:49,127 INFO L521 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] [2021-06-05 05:41:49,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:41:49,128 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2041716967, now seen corresponding path program 2 times [2021-06-05 05:41:49,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:49,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023994976] [2021-06-05 05:41:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:49,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023994976] [2021-06-05 05:41:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023994976] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:41:49,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:41:49,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:41:49,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501912193] [2021-06-05 05:41:49,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:41:49,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:49,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:41:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:41:49,226 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:49,327 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-06-05 05:41:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:41:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:41:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:49,335 INFO L225 Difference]: With dead ends: 863 [2021-06-05 05:41:49,335 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 05:41:49,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:41:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 05:41:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-06-05 05:41:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-06-05 05:41:49,381 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-06-05 05:41:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:49,381 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-06-05 05:41:49,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-06-05 05:41:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:41:49,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:49,386 INFO L521 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, 1, 1, 1] [2021-06-05 05:41:49,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:41:49,386 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1345429901, now seen corresponding path program 1 times [2021-06-05 05:41:49,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:49,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601729220] [2021-06-05 05:41:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:49,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:49,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601729220] [2021-06-05 05:41:49,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601729220] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:41:49,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:41:49,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:41:49,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150759002] [2021-06-05 05:41:49,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:41:49,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:41:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:41:49,447 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:49,460 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-06-05 05:41:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:41:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:41:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:49,469 INFO L225 Difference]: With dead ends: 752 [2021-06-05 05:41:49,469 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 05:41:49,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:41:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 05:41:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-06-05 05:41:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-06-05 05:41:49,504 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-06-05 05:41:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:49,505 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-06-05 05:41:49,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-06-05 05:41:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:41:49,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:49,508 INFO L521 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:49,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:41:49,508 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -919240208, now seen corresponding path program 1 times [2021-06-05 05:41:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984869629] [2021-06-05 05:41:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:41:49,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:49,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984869629] [2021-06-05 05:41:49,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984869629] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:41:49,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:41:49,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:41:49,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544985427] [2021-06-05 05:41:49,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:41:49,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:41:49,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:41:49,555 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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) [2021-06-05 05:41:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:49,571 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-06-05 05:41:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:41:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 31 [2021-06-05 05:41:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:49,577 INFO L225 Difference]: With dead ends: 800 [2021-06-05 05:41:49,577 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 05:41:49,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:41:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 05:41:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-06-05 05:41:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-06-05 05:41:49,606 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-06-05 05:41:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:49,607 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-06-05 05:41:49,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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) [2021-06-05 05:41:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-06-05 05:41:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:41:49,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:49,611 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:49,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:41:49,612 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash -308585039, now seen corresponding path program 1 times [2021-06-05 05:41:49,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:49,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095288194] [2021-06-05 05:41:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:49,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:49,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095288194] [2021-06-05 05:41:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095288194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:49,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825630819] [2021-06-05 05:41:49,871 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 [2021-06-05 05:41:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:41:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:50,275 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 11 treesize of output 7 [2021-06-05 05:41:50,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:50,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:50,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:41:50,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:41:50,376 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 11 treesize of output 7 [2021-06-05 05:41:50,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:50,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:50,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:41:50,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 05:41:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:50,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825630819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:50,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:50,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:41:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411364938] [2021-06-05 05:41:50,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:41:50,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:50,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:41:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:41:50,499 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:51,059 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-06-05 05:41:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:41:51,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:41:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:51,067 INFO L225 Difference]: With dead ends: 1455 [2021-06-05 05:41:51,067 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 05:41:51,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 05:41:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-06-05 05:41:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-06-05 05:41:51,103 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-06-05 05:41:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:51,103 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-06-05 05:41:51,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-06-05 05:41:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:41:51,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:51,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:51,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:51,317 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1659336041, now seen corresponding path program 2 times [2021-06-05 05:41:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:51,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259242008] [2021-06-05 05:41:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259242008] [2021-06-05 05:41:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259242008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791811431] [2021-06-05 05:41:51,388 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 [2021-06-05 05:41:51,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:51,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:51,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:41:51,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:41:51,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791811431] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:41:51,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:41:51,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-06-05 05:41:51,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247862428] [2021-06-05 05:41:51,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:41:51,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:41:51,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:41:51,516 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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) [2021-06-05 05:41:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:51,537 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-06-05 05:41:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:41:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 37 [2021-06-05 05:41:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:51,549 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 05:41:51,549 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 05:41:51,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:41:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 05:41:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-06-05 05:41:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-06-05 05:41:51,611 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-06-05 05:41:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:51,612 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-06-05 05:41:51,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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) [2021-06-05 05:41:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-06-05 05:41:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:41:51,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:51,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:51,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:51,833 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 480818054, now seen corresponding path program 3 times [2021-06-05 05:41:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:51,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219360408] [2021-06-05 05:41:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:41:51,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219360408] [2021-06-05 05:41:51,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219360408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231258726] [2021-06-05 05:41:51,865 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 [2021-06-05 05:41:51,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:41:51,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:51,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:41:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:41:51,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231258726] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:41:51,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:41:51,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-06-05 05:41:51,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357815195] [2021-06-05 05:41:51,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:41:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:41:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:41:51,969 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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) [2021-06-05 05:41:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:52,007 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-06-05 05:41:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:41:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 41 [2021-06-05 05:41:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:52,032 INFO L225 Difference]: With dead ends: 4845 [2021-06-05 05:41:52,032 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 05:41:52,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:41:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 05:41:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-06-05 05:41:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-06-05 05:41:52,176 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-06-05 05:41:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:52,176 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-06-05 05:41:52,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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) [2021-06-05 05:41:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-06-05 05:41:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:41:52,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:52,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:52,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:52,402 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1559474053, now seen corresponding path program 4 times [2021-06-05 05:41:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:52,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617320619] [2021-06-05 05:41:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:41:52,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617320619] [2021-06-05 05:41:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617320619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263394882] [2021-06-05 05:41:52,992 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 [2021-06-05 05:41:53,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:53,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:41:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:53,548 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:41:53,548 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 31 treesize of output 19 [2021-06-05 05:41:53,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:53,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:53,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:41:53,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:41:53,649 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:41:53,649 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 25 treesize of output 13 [2021-06-05 05:41:53,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:53,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:53,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:41:53,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:41:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:53,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263394882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:53,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:53,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 05:41:53,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562934027] [2021-06-05 05:41:53,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:53,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:53,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:53,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:53,752 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:02,428 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-06-05 05:42:02,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-06-05 05:42:02,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:02,519 INFO L225 Difference]: With dead ends: 26830 [2021-06-05 05:42:02,520 INFO L226 Difference]: Without dead ends: 23098 [2021-06-05 05:42:02,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17127 ImplicationChecksByTransitivity, 6915.0ms TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-06-05 05:42:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-06-05 05:42:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-06-05 05:42:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-06-05 05:42:02,823 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-06-05 05:42:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:02,823 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-06-05 05:42:02,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-06-05 05:42:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:02,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:02,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:03,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:03,053 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1256079791, now seen corresponding path program 5 times [2021-06-05 05:42:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:03,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496649162] [2021-06-05 05:42:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:03,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496649162] [2021-06-05 05:42:03,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496649162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:03,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686754017] [2021-06-05 05:42:03,469 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 [2021-06-05 05:42:03,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:42:03,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:03,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:42:03,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:03,871 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:03,871 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 31 treesize of output 19 [2021-06-05 05:42:03,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:03,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:03,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:03,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 05:42:04,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:04,044 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 25 treesize of output 13 [2021-06-05 05:42:04,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:04,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:04,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:04,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:04,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686754017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:04,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:04,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276313859] [2021-06-05 05:42:04,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:04,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:04,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:04,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:04,148 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:08,466 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-06-05 05:42:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:42:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:08,558 INFO L225 Difference]: With dead ends: 28401 [2021-06-05 05:42:08,559 INFO L226 Difference]: Without dead ends: 27869 [2021-06-05 05:42:08,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 3053.4ms TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 05:42:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-06-05 05:42:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-06-05 05:42:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-06-05 05:42:09,001 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-06-05 05:42:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:09,002 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-06-05 05:42:09,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-06-05 05:42:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:09,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:09,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:09,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 05:42:09,229 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 748755985, now seen corresponding path program 6 times [2021-06-05 05:42:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663936537] [2021-06-05 05:42:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:09,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:09,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663936537] [2021-06-05 05:42:09,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663936537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:09,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348017081] [2021-06-05 05:42:09,569 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 [2021-06-05 05:42:09,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:42:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:10,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:10,002 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 29 treesize of output 17 [2021-06-05 05:42:10,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:10,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:10,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:10,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:42:10,206 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:10,207 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 25 treesize of output 13 [2021-06-05 05:42:10,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:10,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:10,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:10,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:10,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348017081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:10,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:10,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:10,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312920091] [2021-06-05 05:42:10,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:10,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:10,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:10,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:10,318 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:14,573 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-06-05 05:42:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 05:42:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:14,668 INFO L225 Difference]: With dead ends: 37756 [2021-06-05 05:42:14,669 INFO L226 Difference]: Without dead ends: 36886 [2021-06-05 05:42:14,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 3392.9ms TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 05:42:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-06-05 05:42:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-06-05 05:42:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-06-05 05:42:15,006 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-06-05 05:42:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:15,006 INFO L482 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-06-05 05:42:15,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-06-05 05:42:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:15,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:15,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:15,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:15,233 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash -169323025, now seen corresponding path program 7 times [2021-06-05 05:42:15,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:15,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878366998] [2021-06-05 05:42:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:15,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878366998] [2021-06-05 05:42:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878366998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061659239] [2021-06-05 05:42:15,596 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 [2021-06-05 05:42:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:15,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:16,008 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:16,009 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 29 treesize of output 17 [2021-06-05 05:42:16,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:16,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:16,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:16,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:42:16,176 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:16,176 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 25 treesize of output 13 [2021-06-05 05:42:16,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:16,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:16,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:16,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:16,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061659239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:16,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:16,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:16,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237240807] [2021-06-05 05:42:16,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:16,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:16,266 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:21,415 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-06-05 05:42:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 05:42:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:21,534 INFO L225 Difference]: With dead ends: 47050 [2021-06-05 05:42:21,534 INFO L226 Difference]: Without dead ends: 45439 [2021-06-05 05:42:21,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 4124.9ms TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 05:42:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-06-05 05:42:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-06-05 05:42:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-06-05 05:42:21,944 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-06-05 05:42:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:21,945 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-06-05 05:42:21,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-06-05 05:42:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:21,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:21,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:22,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:22,167 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash 137214661, now seen corresponding path program 8 times [2021-06-05 05:42:22,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:22,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304579613] [2021-06-05 05:42:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:22,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304579613] [2021-06-05 05:42:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304579613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429379442] [2021-06-05 05:42:22,553 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 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 [2021-06-05 05:42:22,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:22,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:22,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:22,893 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:22,893 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 31 treesize of output 19 [2021-06-05 05:42:22,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:22,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:22,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:22,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 05:42:23,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:23,005 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 25 treesize of output 13 [2021-06-05 05:42:23,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:23,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:23,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:23,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429379442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:23,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:23,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:23,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696568022] [2021-06-05 05:42:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:23,086 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:27,221 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-06-05 05:42:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:42:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:27,304 INFO L225 Difference]: With dead ends: 40863 [2021-06-05 05:42:27,304 INFO L226 Difference]: Without dead ends: 40043 [2021-06-05 05:42:27,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3204.9ms TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 05:42:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-06-05 05:42:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-06-05 05:42:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-06-05 05:42:27,687 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-06-05 05:42:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:27,687 INFO L482 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-06-05 05:42:27,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-06-05 05:42:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:27,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:27,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:27,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:42:27,905 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash -780864349, now seen corresponding path program 9 times [2021-06-05 05:42:27,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:27,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995965429] [2021-06-05 05:42:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:28,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995965429] [2021-06-05 05:42:28,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995965429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403331943] [2021-06-05 05:42:28,259 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 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 [2021-06-05 05:42:28,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:42:28,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:28,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:28,610 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 31 treesize of output 19 [2021-06-05 05:42:28,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:28,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:28,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:28,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-06-05 05:42:28,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 05:42:28,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:28,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:28,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:28,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 05:42:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:28,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403331943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:28,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:28,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:28,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243210650] [2021-06-05 05:42:28,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:28,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:28,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:28,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:28,844 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:34,071 INFO L93 Difference]: Finished difference Result 45280 states and 150579 transitions. [2021-06-05 05:42:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 05:42:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:34,160 INFO L225 Difference]: With dead ends: 45280 [2021-06-05 05:42:34,160 INFO L226 Difference]: Without dead ends: 44360 [2021-06-05 05:42:34,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 4165.6ms TimeCoverageRelationStatistics Valid=2906, Invalid=17116, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 05:42:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44360 states. [2021-06-05 05:42:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44360 to 6507. [2021-06-05 05:42:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-06-05 05:42:34,483 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-06-05 05:42:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:34,483 INFO L482 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-06-05 05:42:34,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-06-05 05:42:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:34,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:34,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:34,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:34,713 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:34,713 INFO L82 PathProgramCache]: Analyzing trace with hash -114430541, now seen corresponding path program 10 times [2021-06-05 05:42:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:34,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140867122] [2021-06-05 05:42:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:35,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140867122] [2021-06-05 05:42:35,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140867122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668919686] [2021-06-05 05:42:35,065 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 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 [2021-06-05 05:42:35,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:35,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:35,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:35,446 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 31 treesize of output 19 [2021-06-05 05:42:35,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:35,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:35,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:35,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:42:35,566 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:35,566 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 25 treesize of output 13 [2021-06-05 05:42:35,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:35,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:35,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:35,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:35,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668919686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:35,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:35,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:35,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116273510] [2021-06-05 05:42:35,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:35,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:35,641 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:41,594 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-06-05 05:42:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 05:42:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:41,684 INFO L225 Difference]: With dead ends: 40459 [2021-06-05 05:42:41,684 INFO L226 Difference]: Without dead ends: 39249 [2021-06-05 05:42:41,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 4655.3ms TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 05:42:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-06-05 05:42:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-06-05 05:42:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-06-05 05:42:41,969 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-06-05 05:42:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:41,970 INFO L482 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-06-05 05:42:41,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-06-05 05:42:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:41,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:41,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:42,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:42:42,197 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash -686560397, now seen corresponding path program 11 times [2021-06-05 05:42:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:42,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843480930] [2021-06-05 05:42:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:42,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843480930] [2021-06-05 05:42:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843480930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805048452] [2021-06-05 05:42:42,493 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 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 [2021-06-05 05:42:42,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:42:42,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:42:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:42,878 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 31 treesize of output 19 [2021-06-05 05:42:42,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:42,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:42,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:42,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-06-05 05:42:43,033 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:43,033 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 25 treesize of output 13 [2021-06-05 05:42:43,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:43,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:43,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:43,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:43,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805048452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:43,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:43,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:43,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752125748] [2021-06-05 05:42:43,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:43,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:43,108 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:46,903 INFO L93 Difference]: Finished difference Result 22347 states and 74432 transitions. [2021-06-05 05:42:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:42:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:46,945 INFO L225 Difference]: With dead ends: 22347 [2021-06-05 05:42:46,946 INFO L226 Difference]: Without dead ends: 22075 [2021-06-05 05:42:46,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 2458.4ms TimeCoverageRelationStatistics Valid=1403, Invalid=7339, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:42:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2021-06-05 05:42:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 6570. [2021-06-05 05:42:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-06-05 05:42:47,148 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-06-05 05:42:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:47,148 INFO L482 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-06-05 05:42:47,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-06-05 05:42:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:47,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:47,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:47,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:42:47,360 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash 263509385, now seen corresponding path program 12 times [2021-06-05 05:42:47,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:47,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500923831] [2021-06-05 05:42:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:47,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500923831] [2021-06-05 05:42:47,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500923831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530260329] [2021-06-05 05:42:47,639 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 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 [2021-06-05 05:42:47,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:42:47,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:42:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:47,994 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:42:47,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:48,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:48,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:48,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:42:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:48,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:48,227 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:42:48,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:48,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:48,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:48,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 05:42:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:48,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530260329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:48,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:48,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:48,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273462879] [2021-06-05 05:42:48,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:48,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:48,317 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:50,827 INFO L93 Difference]: Finished difference Result 13093 states and 43669 transitions. [2021-06-05 05:42:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:42:50,828 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:50,850 INFO L225 Difference]: With dead ends: 13093 [2021-06-05 05:42:50,850 INFO L226 Difference]: Without dead ends: 12613 [2021-06-05 05:42:50,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 1971.9ms TimeCoverageRelationStatistics Valid=1057, Invalid=6083, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:42:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2021-06-05 05:42:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6722. [2021-06-05 05:42:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-06-05 05:42:50,975 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-06-05 05:42:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:50,975 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-06-05 05:42:50,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-06-05 05:42:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:50,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:50,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:51,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:51,187 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash -243814421, now seen corresponding path program 13 times [2021-06-05 05:42:51,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:51,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557909311] [2021-06-05 05:42:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:51,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557909311] [2021-06-05 05:42:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557909311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172627669] [2021-06-05 05:42:51,462 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 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 [2021-06-05 05:42:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:51,811 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:51,811 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 29 treesize of output 17 [2021-06-05 05:42:51,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:51,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:51,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:51,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:42:51,962 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:51,962 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 25 treesize of output 13 [2021-06-05 05:42:51,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:51,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:51,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:51,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172627669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:52,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:52,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:52,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994653023] [2021-06-05 05:42:52,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:52,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:52,059 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:53,782 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-06-05 05:42:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:42:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:53,805 INFO L225 Difference]: With dead ends: 12931 [2021-06-05 05:42:53,805 INFO L226 Difference]: Without dead ends: 12631 [2021-06-05 05:42:53,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1471.7ms TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:42:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-06-05 05:42:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-06-05 05:42:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-06-05 05:42:53,923 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-06-05 05:42:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:53,924 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-06-05 05:42:53,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-06-05 05:42:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:53,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:53,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:54,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:42:54,133 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1161893431, now seen corresponding path program 14 times [2021-06-05 05:42:54,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:54,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803654324] [2021-06-05 05:42:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:54,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:54,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803654324] [2021-06-05 05:42:54,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803654324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:54,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648338903] [2021-06-05 05:42:54,462 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 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 [2021-06-05 05:42:54,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:42:54,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:54,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:54,842 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 29 treesize of output 17 [2021-06-05 05:42:54,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:54,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:54,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:54,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:42:54,983 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:42:54,984 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 25 treesize of output 13 [2021-06-05 05:42:54,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:54,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:54,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:54,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:42:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:55,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648338903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:55,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:55,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:42:55,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557458771] [2021-06-05 05:42:55,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:42:55,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:55,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:42:55,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:42:55,083 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:59,359 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-06-05 05:42:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:42:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:42:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:59,416 INFO L225 Difference]: With dead ends: 31575 [2021-06-05 05:42:59,416 INFO L226 Difference]: Without dead ends: 31013 [2021-06-05 05:42:59,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 3255.0ms TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:42:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-06-05 05:42:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-06-05 05:42:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-06-05 05:42:59,633 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-06-05 05:42:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:59,633 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-06-05 05:42:59,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-06-05 05:42:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:42:59,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:59,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:59,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:59,842 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1107000947, now seen corresponding path program 15 times [2021-06-05 05:42:59,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:59,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723392296] [2021-06-05 05:42:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:00,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723392296] [2021-06-05 05:43:00,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723392296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:00,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735757063] [2021-06-05 05:43:00,115 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 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 [2021-06-05 05:43:00,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:43:00,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:43:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 05:43:00,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:00,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:00,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:00,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-06-05 05:43:00,712 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:00,712 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 25 treesize of output 13 [2021-06-05 05:43:00,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:00,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:00,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:00,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:00,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735757063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:00,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:00,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:00,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997040647] [2021-06-05 05:43:00,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:00,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:00,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:00,806 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:06,834 INFO L93 Difference]: Finished difference Result 35083 states and 116558 transitions. [2021-06-05 05:43:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 05:43:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:06,907 INFO L225 Difference]: With dead ends: 35083 [2021-06-05 05:43:06,907 INFO L226 Difference]: Without dead ends: 34089 [2021-06-05 05:43:06,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 4568.1ms TimeCoverageRelationStatistics Valid=2817, Invalid=14739, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 05:43:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34089 states. [2021-06-05 05:43:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34089 to 7792. [2021-06-05 05:43:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.3162623539982032) internal successors, (25837), 7791 states have internal predecessors, (25837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 25837 transitions. [2021-06-05 05:43:07,183 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 25837 transitions. Word has length 44 [2021-06-05 05:43:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:07,184 INFO L482 AbstractCegarLoop]: Abstraction has 7792 states and 25837 transitions. [2021-06-05 05:43:07,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 25837 transitions. [2021-06-05 05:43:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:07,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:07,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:07,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:43:07,398 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:07,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:07,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1435545757, now seen corresponding path program 16 times [2021-06-05 05:43:07,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:07,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171957520] [2021-06-05 05:43:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:07,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:07,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171957520] [2021-06-05 05:43:07,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171957520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:07,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608012505] [2021-06-05 05:43:07,800 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 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 [2021-06-05 05:43:07,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:07,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:43:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:08,190 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:08,191 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 31 treesize of output 19 [2021-06-05 05:43:08,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:08,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:08,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:08,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:43:08,279 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:08,279 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 25 treesize of output 13 [2021-06-05 05:43:08,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:08,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:08,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:08,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:08,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608012505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:08,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:08,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58632432] [2021-06-05 05:43:08,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:08,374 INFO L87 Difference]: Start difference. First operand 7792 states and 25837 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:14,822 INFO L93 Difference]: Finished difference Result 41800 states and 139248 transitions. [2021-06-05 05:43:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 05:43:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:14,895 INFO L225 Difference]: With dead ends: 41800 [2021-06-05 05:43:14,895 INFO L226 Difference]: Without dead ends: 37404 [2021-06-05 05:43:14,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 5015.9ms TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 05:43:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37404 states. [2021-06-05 05:43:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37404 to 8391. [2021-06-05 05:43:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 3.3079856972586414) internal successors, (27754), 8390 states have internal predecessors, (27754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 27754 transitions. [2021-06-05 05:43:15,193 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 27754 transitions. Word has length 44 [2021-06-05 05:43:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:15,193 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 27754 transitions. [2021-06-05 05:43:15,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 27754 transitions. [2021-06-05 05:43:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:15,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:15,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:15,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:15,406 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash -789276919, now seen corresponding path program 17 times [2021-06-05 05:43:15,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:15,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610381795] [2021-06-05 05:43:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:15,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610381795] [2021-06-05 05:43:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610381795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15753099] [2021-06-05 05:43:15,705 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 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 [2021-06-05 05:43:15,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:43:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:15,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 05:43:15,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:16,015 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:16,015 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 31 treesize of output 19 [2021-06-05 05:43:16,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:16,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:16,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:16,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 05:43:16,153 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:16,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:16,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:16,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:16,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:16,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:16,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15753099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:16,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:16,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627117649] [2021-06-05 05:43:16,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:16,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:16,241 INFO L87 Difference]: Start difference. First operand 8391 states and 27754 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:20,080 INFO L93 Difference]: Finished difference Result 33537 states and 111619 transitions. [2021-06-05 05:43:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 05:43:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:20,141 INFO L225 Difference]: With dead ends: 33537 [2021-06-05 05:43:20,142 INFO L226 Difference]: Without dead ends: 33005 [2021-06-05 05:43:20,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2795.1ms TimeCoverageRelationStatistics Valid=2279, Invalid=12483, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 05:43:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33005 states. [2021-06-05 05:43:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33005 to 8815. [2021-06-05 05:43:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 3.3045155434535967) internal successors, (29126), 8814 states have internal predecessors, (29126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 29126 transitions. [2021-06-05 05:43:20,424 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 29126 transitions. Word has length 44 [2021-06-05 05:43:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:20,424 INFO L482 AbstractCegarLoop]: Abstraction has 8815 states and 29126 transitions. [2021-06-05 05:43:20,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 29126 transitions. [2021-06-05 05:43:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:20,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:20,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:20,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:43:20,638 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1296600725, now seen corresponding path program 18 times [2021-06-05 05:43:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:20,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012259529] [2021-06-05 05:43:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:20,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012259529] [2021-06-05 05:43:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012259529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740143001] [2021-06-05 05:43:20,972 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 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 [2021-06-05 05:43:21,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:43:21,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:43:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:21,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:21,298 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 29 treesize of output 17 [2021-06-05 05:43:21,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:21,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:21,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:21,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:43:21,428 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:21,428 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 25 treesize of output 13 [2021-06-05 05:43:21,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:21,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:21,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:21,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:21,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740143001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:21,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:21,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:21,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173807526] [2021-06-05 05:43:21,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:21,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:21,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:21,513 INFO L87 Difference]: Start difference. First operand 8815 states and 29126 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:26,175 INFO L93 Difference]: Finished difference Result 42883 states and 142841 transitions. [2021-06-05 05:43:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 05:43:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:26,260 INFO L225 Difference]: With dead ends: 42883 [2021-06-05 05:43:26,260 INFO L226 Difference]: Without dead ends: 41993 [2021-06-05 05:43:26,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 3613.0ms TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 05:43:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41993 states. [2021-06-05 05:43:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41993 to 8932. [2021-06-05 05:43:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 3.3055648863509126) internal successors, (29522), 8931 states have internal predecessors, (29522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 29522 transitions. [2021-06-05 05:43:26,667 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 29522 transitions. Word has length 44 [2021-06-05 05:43:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:26,667 INFO L482 AbstractCegarLoop]: Abstraction has 8932 states and 29522 transitions. [2021-06-05 05:43:26,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 29522 transitions. [2021-06-05 05:43:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:26,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:26,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:26,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 05:43:26,882 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:26,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2080287561, now seen corresponding path program 19 times [2021-06-05 05:43:26,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:26,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889407602] [2021-06-05 05:43:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:27,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:27,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889407602] [2021-06-05 05:43:27,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889407602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621070393] [2021-06-05 05:43:27,220 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 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 [2021-06-05 05:43:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:27,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:43:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:27,577 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:27,577 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 29 treesize of output 17 [2021-06-05 05:43:27,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:27,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:27,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:27,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:43:27,707 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:27,708 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 25 treesize of output 13 [2021-06-05 05:43:27,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:27,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:27,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:27,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:27,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621070393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:27,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:27,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:27,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335240949] [2021-06-05 05:43:27,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:27,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:27,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:27,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:27,782 INFO L87 Difference]: Start difference. First operand 8932 states and 29522 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:33,622 INFO L93 Difference]: Finished difference Result 48973 states and 162757 transitions. [2021-06-05 05:43:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 05:43:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:33,713 INFO L225 Difference]: With dead ends: 48973 [2021-06-05 05:43:33,713 INFO L226 Difference]: Without dead ends: 47923 [2021-06-05 05:43:33,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 4591.3ms TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 05:43:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47923 states. [2021-06-05 05:43:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47923 to 9050. [2021-06-05 05:43:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9049 states have (on average 3.305448115813902) internal successors, (29911), 9049 states have internal predecessors, (29911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 29911 transitions. [2021-06-05 05:43:34,051 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 29911 transitions. Word has length 44 [2021-06-05 05:43:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:34,051 INFO L482 AbstractCegarLoop]: Abstraction has 9050 states and 29911 transitions. [2021-06-05 05:43:34,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 29911 transitions. [2021-06-05 05:43:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:34,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:34,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:34,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:34,281 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1908142049, now seen corresponding path program 20 times [2021-06-05 05:43:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:34,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874353005] [2021-06-05 05:43:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:34,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874353005] [2021-06-05 05:43:34,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874353005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758173392] [2021-06-05 05:43:34,649 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 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 [2021-06-05 05:43:34,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:43:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:34,996 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:34,996 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 31 treesize of output 19 [2021-06-05 05:43:34,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:35,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:35,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:35,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 05:43:35,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:35,111 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 25 treesize of output 13 [2021-06-05 05:43:35,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:35,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:35,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:35,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758173392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:35,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:35,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057831220] [2021-06-05 05:43:35,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:35,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:35,181 INFO L87 Difference]: Start difference. First operand 9050 states and 29911 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:39,742 INFO L93 Difference]: Finished difference Result 45204 states and 150223 transitions. [2021-06-05 05:43:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 05:43:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:39,828 INFO L225 Difference]: With dead ends: 45204 [2021-06-05 05:43:39,828 INFO L226 Difference]: Without dead ends: 44384 [2021-06-05 05:43:39,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 3431.1ms TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 05:43:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-06-05 05:43:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 9149. [2021-06-05 05:43:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9149 states, 9148 states have (on average 3.3065150852645386) internal successors, (30248), 9148 states have internal predecessors, (30248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9149 states to 9149 states and 30248 transitions. [2021-06-05 05:43:40,200 INFO L78 Accepts]: Start accepts. Automaton has 9149 states and 30248 transitions. Word has length 44 [2021-06-05 05:43:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:40,201 INFO L482 AbstractCegarLoop]: Abstraction has 9149 states and 30248 transitions. [2021-06-05 05:43:40,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9149 states and 30248 transitions. [2021-06-05 05:43:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:40,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:40,213 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:40,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:43:40,413 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1468746237, now seen corresponding path program 21 times [2021-06-05 05:43:40,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:40,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833041956] [2021-06-05 05:43:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:40,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:40,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833041956] [2021-06-05 05:43:40,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833041956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:40,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132669336] [2021-06-05 05:43:40,734 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 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 [2021-06-05 05:43:40,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:43:40,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:43:40,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:41,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:41,063 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 31 treesize of output 19 [2021-06-05 05:43:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:41,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:41,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:41,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-06-05 05:43:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:41,201 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 25 treesize of output 13 [2021-06-05 05:43:41,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:41,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:41,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:41,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 05:43:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132669336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:41,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:41,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:41,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749281856] [2021-06-05 05:43:41,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:41,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:41,288 INFO L87 Difference]: Start difference. First operand 9149 states and 30248 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:47,053 INFO L93 Difference]: Finished difference Result 49923 states and 165734 transitions. [2021-06-05 05:43:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 05:43:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:47,145 INFO L225 Difference]: With dead ends: 49923 [2021-06-05 05:43:47,145 INFO L226 Difference]: Without dead ends: 49003 [2021-06-05 05:43:47,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4493.0ms TimeCoverageRelationStatistics Valid=3371, Invalid=20191, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 05:43:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49003 states. [2021-06-05 05:43:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49003 to 9032. [2021-06-05 05:43:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 3.3043959694386005) internal successors, (29842), 9031 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 29842 transitions. [2021-06-05 05:43:47,499 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 29842 transitions. Word has length 44 [2021-06-05 05:43:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:47,500 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 29842 transitions. [2021-06-05 05:43:47,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 29842 transitions. [2021-06-05 05:43:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:47,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:47,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:47,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:47,712 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2135180045, now seen corresponding path program 22 times [2021-06-05 05:43:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:47,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457387619] [2021-06-05 05:43:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:48,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457387619] [2021-06-05 05:43:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457387619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276451101] [2021-06-05 05:43:48,019 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 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 [2021-06-05 05:43:48,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:43:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:48,422 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:48,422 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 31 treesize of output 19 [2021-06-05 05:43:48,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:48,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:48,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:48,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:43:48,498 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:48,498 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 25 treesize of output 13 [2021-06-05 05:43:48,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:48,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:48,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:48,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276451101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:48,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:48,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:48,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178807387] [2021-06-05 05:43:48,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:48,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:48,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:48,569 INFO L87 Difference]: Start difference. First operand 9032 states and 29842 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:55,208 INFO L93 Difference]: Finished difference Result 45046 states and 149636 transitions. [2021-06-05 05:43:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 05:43:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:43:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:55,296 INFO L225 Difference]: With dead ends: 45046 [2021-06-05 05:43:55,296 INFO L226 Difference]: Without dead ends: 43836 [2021-06-05 05:43:55,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 4975.0ms TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-06-05 05:43:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43836 states. [2021-06-05 05:43:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43836 to 8973. [2021-06-05 05:43:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 3.3012706197057513) internal successors, (29619), 8972 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 29619 transitions. [2021-06-05 05:43:55,636 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 29619 transitions. Word has length 44 [2021-06-05 05:43:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 8973 states and 29619 transitions. [2021-06-05 05:43:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 29619 transitions. [2021-06-05 05:43:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:43:55,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:55,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:55,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:55,848 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1563050189, now seen corresponding path program 23 times [2021-06-05 05:43:55,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:55,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592203913] [2021-06-05 05:43:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:56,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:56,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592203913] [2021-06-05 05:43:56,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592203913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:56,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083611586] [2021-06-05 05:43:56,173 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 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 [2021-06-05 05:43:56,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:43:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:43:56,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:56,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:56,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:56,614 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 31 treesize of output 19 [2021-06-05 05:43:56,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:56,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:56,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:56,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-06-05 05:43:56,798 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:56,798 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 25 treesize of output 13 [2021-06-05 05:43:56,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:56,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:56,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:56,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:43:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:56,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083611586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:56,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:56,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:43:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288181453] [2021-06-05 05:43:56,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:43:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:56,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:43:56,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:56,875 INFO L87 Difference]: Start difference. First operand 8973 states and 29619 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:00,323 INFO L93 Difference]: Finished difference Result 23013 states and 76366 transitions. [2021-06-05 05:44:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:44:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:00,369 INFO L225 Difference]: With dead ends: 23013 [2021-06-05 05:44:00,369 INFO L226 Difference]: Without dead ends: 22741 [2021-06-05 05:44:00,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 2304.1ms TimeCoverageRelationStatistics Valid=1189, Invalid=6121, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:44:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22741 states. [2021-06-05 05:44:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22741 to 8595. [2021-06-05 05:44:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.3031184547358623) internal successors, (28387), 8594 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 28387 transitions. [2021-06-05 05:44:00,566 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 28387 transitions. Word has length 44 [2021-06-05 05:44:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:00,566 INFO L482 AbstractCegarLoop]: Abstraction has 8595 states and 28387 transitions. [2021-06-05 05:44:00,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 28387 transitions. [2021-06-05 05:44:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:00,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:00,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:00,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:44:00,778 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1134360447, now seen corresponding path program 24 times [2021-06-05 05:44:00,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:00,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190037426] [2021-06-05 05:44:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:44:01,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190037426] [2021-06-05 05:44:01,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190037426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772928648] [2021-06-05 05:44:01,196 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 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 [2021-06-05 05:44:01,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:44:01,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:01,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:01,617 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:01,617 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 31 treesize of output 19 [2021-06-05 05:44:01,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:01,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:01,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:01,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:44:01,688 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:01,688 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 25 treesize of output 13 [2021-06-05 05:44:01,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:01,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:01,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:01,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772928648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 05:44:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661816634] [2021-06-05 05:44:01,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:44:01,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:01,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:44:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:44:01,786 INFO L87 Difference]: Start difference. First operand 8595 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:08,344 INFO L93 Difference]: Finished difference Result 35903 states and 119478 transitions. [2021-06-05 05:44:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 05:44:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:08,406 INFO L225 Difference]: With dead ends: 35903 [2021-06-05 05:44:08,406 INFO L226 Difference]: Without dead ends: 31668 [2021-06-05 05:44:08,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 5227.8ms TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 05:44:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2021-06-05 05:44:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 9033. [2021-06-05 05:44:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9033 states, 9032 states have (on average 3.2980513728963685) internal successors, (29788), 9032 states have internal predecessors, (29788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 29788 transitions. [2021-06-05 05:44:08,676 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 29788 transitions. Word has length 44 [2021-06-05 05:44:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:08,676 INFO L482 AbstractCegarLoop]: Abstraction has 9033 states and 29788 transitions. [2021-06-05 05:44:08,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 29788 transitions. [2021-06-05 05:44:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:08,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:08,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:08,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:08,889 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -345053005, now seen corresponding path program 25 times [2021-06-05 05:44:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:08,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874360988] [2021-06-05 05:44:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:09,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:09,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874360988] [2021-06-05 05:44:09,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874360988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:09,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561571856] [2021-06-05 05:44:09,256 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 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 [2021-06-05 05:44:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:09,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:09,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:09,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:09,607 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 31 treesize of output 19 [2021-06-05 05:44:09,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:09,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:09,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:09,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 05:44:09,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:09,738 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 25 treesize of output 13 [2021-06-05 05:44:09,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:09,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:09,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:09,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:09,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561571856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:09,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:09,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:44:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454279590] [2021-06-05 05:44:09,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:44:09,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:44:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:44:09,808 INFO L87 Difference]: Start difference. First operand 9033 states and 29788 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:13,974 INFO L93 Difference]: Finished difference Result 36007 states and 119800 transitions. [2021-06-05 05:44:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 05:44:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:14,045 INFO L225 Difference]: With dead ends: 36007 [2021-06-05 05:44:14,045 INFO L226 Difference]: Without dead ends: 35475 [2021-06-05 05:44:14,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 3211.9ms TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 05:44:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35475 states. [2021-06-05 05:44:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35475 to 9234. [2021-06-05 05:44:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 3.30336835264811) internal successors, (30500), 9233 states have internal predecessors, (30500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 30500 transitions. [2021-06-05 05:44:14,463 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 30500 transitions. Word has length 44 [2021-06-05 05:44:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:14,463 INFO L482 AbstractCegarLoop]: Abstraction has 9234 states and 30500 transitions. [2021-06-05 05:44:14,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 30500 transitions. [2021-06-05 05:44:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:14,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:14,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:14,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 05:44:14,676 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash -852376811, now seen corresponding path program 26 times [2021-06-05 05:44:14,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:14,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501701539] [2021-06-05 05:44:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:14,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:14,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501701539] [2021-06-05 05:44:14,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501701539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:14,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784913687] [2021-06-05 05:44:14,981 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 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 [2021-06-05 05:44:15,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:15,290 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:15,290 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 31 treesize of output 19 [2021-06-05 05:44:15,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:15,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:15,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:15,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 05:44:15,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:15,424 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 25 treesize of output 13 [2021-06-05 05:44:15,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:15,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:15,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:15,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:15,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784913687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:15,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:15,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:44:15,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483727095] [2021-06-05 05:44:15,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:44:15,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:15,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:44:15,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:44:15,504 INFO L87 Difference]: Start difference. First operand 9234 states and 30500 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:19,751 INFO L93 Difference]: Finished difference Result 34504 states and 114768 transitions. [2021-06-05 05:44:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 05:44:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:19,815 INFO L225 Difference]: With dead ends: 34504 [2021-06-05 05:44:19,815 INFO L226 Difference]: Without dead ends: 34104 [2021-06-05 05:44:19,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3238.3ms TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:44:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34104 states. [2021-06-05 05:44:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34104 to 9294. [2021-06-05 05:44:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 3.3035618207252773) internal successors, (30700), 9293 states have internal predecessors, (30700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 30700 transitions. [2021-06-05 05:44:20,095 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 30700 transitions. Word has length 44 [2021-06-05 05:44:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:20,095 INFO L482 AbstractCegarLoop]: Abstraction has 9294 states and 30700 transitions. [2021-06-05 05:44:20,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 30700 transitions. [2021-06-05 05:44:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:20,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:20,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:20,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:20,309 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1770455821, now seen corresponding path program 27 times [2021-06-05 05:44:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:20,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284783254] [2021-06-05 05:44:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:20,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:20,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284783254] [2021-06-05 05:44:20,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284783254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:20,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145035011] [2021-06-05 05:44:20,704 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 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 [2021-06-05 05:44:20,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:44:20,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:21,102 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:21,104 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 31 treesize of output 19 [2021-06-05 05:44:21,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:21,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:21,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:21,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 05:44:21,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:21,244 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 25 treesize of output 13 [2021-06-05 05:44:21,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:21,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:21,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:21,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145035011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:21,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:21,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:44:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098655931] [2021-06-05 05:44:21,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:44:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:44:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:44:21,314 INFO L87 Difference]: Start difference. First operand 9294 states and 30700 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:26,446 INFO L93 Difference]: Finished difference Result 36651 states and 121809 transitions. [2021-06-05 05:44:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:44:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:26,516 INFO L225 Difference]: With dead ends: 36651 [2021-06-05 05:44:26,516 INFO L226 Difference]: Without dead ends: 36236 [2021-06-05 05:44:26,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5972 ImplicationChecksByTransitivity, 4169.3ms TimeCoverageRelationStatistics Valid=2681, Invalid=15141, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 05:44:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36236 states. [2021-06-05 05:44:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36236 to 9180. [2021-06-05 05:44:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-06-05 05:44:26,882 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-06-05 05:44:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:26,882 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-06-05 05:44:26,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-06-05 05:44:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:26,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:26,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:27,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 05:44:27,097 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1463918135, now seen corresponding path program 28 times [2021-06-05 05:44:27,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:27,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687762220] [2021-06-05 05:44:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:27,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687762220] [2021-06-05 05:44:27,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687762220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644669886] [2021-06-05 05:44:27,433 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 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 [2021-06-05 05:44:27,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:27,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:27,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:27,764 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:27,764 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 31 treesize of output 19 [2021-06-05 05:44:27,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:27,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:27,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:27,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 05:44:27,870 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:27,870 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 25 treesize of output 13 [2021-06-05 05:44:27,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:27,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:27,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:27,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:27,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644669886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:27,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:44:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592553068] [2021-06-05 05:44:27,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:44:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:44:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:44:27,939 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:31,948 INFO L93 Difference]: Finished difference Result 34096 states and 113371 transitions. [2021-06-05 05:44:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 05:44:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:32,011 INFO L225 Difference]: With dead ends: 34096 [2021-06-05 05:44:32,011 INFO L226 Difference]: Without dead ends: 33696 [2021-06-05 05:44:32,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 2989.1ms TimeCoverageRelationStatistics Valid=1870, Invalid=10340, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 05:44:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33696 states. [2021-06-05 05:44:32,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33696 to 9279. [2021-06-05 05:44:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 3.3040525975425736) internal successors, (30655), 9278 states have internal predecessors, (30655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 30655 transitions. [2021-06-05 05:44:32,285 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 30655 transitions. Word has length 44 [2021-06-05 05:44:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:32,285 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 30655 transitions. [2021-06-05 05:44:32,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 30655 transitions. [2021-06-05 05:44:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:32,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:32,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:32,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:32,498 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:32,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1912970151, now seen corresponding path program 29 times [2021-06-05 05:44:32,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:32,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668011224] [2021-06-05 05:44:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:32,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668011224] [2021-06-05 05:44:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668011224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559136478] [2021-06-05 05:44:32,894 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 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 [2021-06-05 05:44:32,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:44:32,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:32,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:44:32,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:33,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:33,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:33,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 05:44:33,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:33,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:33,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:33,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:27 [2021-06-05 05:44:33,374 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:33,375 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 25 treesize of output 13 [2021-06-05 05:44:33,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:33,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:33,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:33,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559136478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:33,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:33,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:44:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823215485] [2021-06-05 05:44:33,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:44:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:44:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:44:33,445 INFO L87 Difference]: Start difference. First operand 9279 states and 30655 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:38,470 INFO L93 Difference]: Finished difference Result 35956 states and 119480 transitions. [2021-06-05 05:44:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:44:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:38,544 INFO L225 Difference]: With dead ends: 35956 [2021-06-05 05:44:38,544 INFO L226 Difference]: Without dead ends: 35541 [2021-06-05 05:44:38,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 3793.6ms TimeCoverageRelationStatistics Valid=2393, Invalid=13863, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 05:44:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35541 states. [2021-06-05 05:44:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35541 to 9180. [2021-06-05 05:44:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-06-05 05:44:38,910 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-06-05 05:44:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:38,910 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-06-05 05:44:38,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-06-05 05:44:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:38,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:38,922 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:39,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 05:44:39,123 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1715563337, now seen corresponding path program 30 times [2021-06-05 05:44:39,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:39,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241239167] [2021-06-05 05:44:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:39,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241239167] [2021-06-05 05:44:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241239167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548293317] [2021-06-05 05:44:39,520 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 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 [2021-06-05 05:44:39,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:44:39,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:39,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:39,955 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 31 treesize of output 19 [2021-06-05 05:44:39,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:39,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:39,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:39,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:44:40,029 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:40,029 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 25 treesize of output 13 [2021-06-05 05:44:40,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:40,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:40,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:40,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:40,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548293317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:40,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:40,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 05:44:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961040990] [2021-06-05 05:44:40,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:44:40,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:40,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:44:40,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:44:40,100 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:45,355 INFO L93 Difference]: Finished difference Result 32902 states and 109101 transitions. [2021-06-05 05:44:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 05:44:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:45,418 INFO L225 Difference]: With dead ends: 32902 [2021-06-05 05:44:45,418 INFO L226 Difference]: Without dead ends: 32417 [2021-06-05 05:44:45,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 4333.1ms TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 05:44:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32417 states. [2021-06-05 05:44:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32417 to 9018. [2021-06-05 05:44:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 3.301763335921038) internal successors, (29772), 9017 states have internal predecessors, (29772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 29772 transitions. [2021-06-05 05:44:45,676 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 29772 transitions. Word has length 44 [2021-06-05 05:44:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:45,676 INFO L482 AbstractCegarLoop]: Abstraction has 9018 states and 29772 transitions. [2021-06-05 05:44:45,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 29772 transitions. [2021-06-05 05:44:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:45,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:45,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:45,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:45,888 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash 856011747, now seen corresponding path program 31 times [2021-06-05 05:44:45,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:45,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374841700] [2021-06-05 05:44:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:44:46,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374841700] [2021-06-05 05:44:46,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374841700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219669364] [2021-06-05 05:44:46,218 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 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 [2021-06-05 05:44:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:46,589 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:46,590 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 31 treesize of output 19 [2021-06-05 05:44:46,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:46,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:46,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:46,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:44:46,661 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:46,661 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 25 treesize of output 13 [2021-06-05 05:44:46,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:46,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:46,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:46,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:46,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219669364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:46,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:46,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 05:44:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072581460] [2021-06-05 05:44:46,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:44:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:44:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:44:46,740 INFO L87 Difference]: Start difference. First operand 9018 states and 29772 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:52,466 INFO L93 Difference]: Finished difference Result 32479 states and 108314 transitions. [2021-06-05 05:44:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 05:44:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:52,521 INFO L225 Difference]: With dead ends: 32479 [2021-06-05 05:44:52,521 INFO L226 Difference]: Without dead ends: 28654 [2021-06-05 05:44:52,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 4427.0ms TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 05:44:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28654 states. [2021-06-05 05:44:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28654 to 9358. [2021-06-05 05:44:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9358 states, 9357 states have (on average 3.2972106444373197) internal successors, (30852), 9357 states have internal predecessors, (30852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9358 states to 9358 states and 30852 transitions. [2021-06-05 05:44:52,755 INFO L78 Accepts]: Start accepts. Automaton has 9358 states and 30852 transitions. Word has length 44 [2021-06-05 05:44:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:52,756 INFO L482 AbstractCegarLoop]: Abstraction has 9358 states and 30852 transitions. [2021-06-05 05:44:52,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9358 states and 30852 transitions. [2021-06-05 05:44:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:44:52,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:52,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:52,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:52,975 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:52,975 INFO L82 PathProgramCache]: Analyzing trace with hash 218619737, now seen corresponding path program 32 times [2021-06-05 05:44:52,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:52,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990808740] [2021-06-05 05:44:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:44:53,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990808740] [2021-06-05 05:44:53,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990808740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269244274] [2021-06-05 05:44:53,288 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 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 [2021-06-05 05:44:53,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:53,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:44:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:53,656 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:53,657 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 31 treesize of output 19 [2021-06-05 05:44:53,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:53,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:53,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:53,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:44:53,728 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:44:53,729 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 25 treesize of output 13 [2021-06-05 05:44:53,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:53,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:53,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:53,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:44:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:53,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269244274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:53,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:53,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 05:44:53,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299921016] [2021-06-05 05:44:53,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:44:53,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:44:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:44:53,811 INFO L87 Difference]: Start difference. First operand 9358 states and 30852 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:59,597 INFO L93 Difference]: Finished difference Result 35967 states and 119998 transitions. [2021-06-05 05:44:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 05:44:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:44:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:59,660 INFO L225 Difference]: With dead ends: 35967 [2021-06-05 05:44:59,660 INFO L226 Difference]: Without dead ends: 33259 [2021-06-05 05:44:59,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10209 ImplicationChecksByTransitivity, 4786.5ms TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 05:44:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33259 states. [2021-06-05 05:44:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33259 to 9428. [2021-06-05 05:44:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.294049008168028) internal successors, (31053), 9427 states have internal predecessors, (31053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 31053 transitions. [2021-06-05 05:44:59,911 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 31053 transitions. Word has length 44 [2021-06-05 05:44:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:59,911 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 31053 transitions. [2021-06-05 05:44:59,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 31053 transitions. [2021-06-05 05:44:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:44:59,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:59,923 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:00,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 05:45:00,125 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1309223083, now seen corresponding path program 33 times [2021-06-05 05:45:00,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:00,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493219318] [2021-06-05 05:45:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:00,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:00,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493219318] [2021-06-05 05:45:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493219318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:00,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508777802] [2021-06-05 05:45:00,150 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 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 [2021-06-05 05:45:00,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:45:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:45:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:45:00,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508777802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:00,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:00,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:45:00,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129813926] [2021-06-05 05:45:00,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:45:00,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:45:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:45:00,252 INFO L87 Difference]: Start difference. First operand 9428 states and 31053 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:00,323 INFO L93 Difference]: Finished difference Result 14357 states and 47370 transitions. [2021-06-05 05:45:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:45:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:45:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:00,356 INFO L225 Difference]: With dead ends: 14357 [2021-06-05 05:45:00,356 INFO L226 Difference]: Without dead ends: 14153 [2021-06-05 05:45:00,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:45:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-06-05 05:45:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 10944. [2021-06-05 05:45:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 3.3225806451612905) internal successors, (36359), 10943 states have internal predecessors, (36359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 36359 transitions. [2021-06-05 05:45:00,534 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 36359 transitions. Word has length 47 [2021-06-05 05:45:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:00,534 INFO L482 AbstractCegarLoop]: Abstraction has 10944 states and 36359 transitions. [2021-06-05 05:45:00,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 36359 transitions. [2021-06-05 05:45:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:45:00,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:00,548 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:00,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:00,752 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2079845064, now seen corresponding path program 34 times [2021-06-05 05:45:00,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:00,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478052150] [2021-06-05 05:45:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:01,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:01,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478052150] [2021-06-05 05:45:01,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478052150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:01,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735837456] [2021-06-05 05:45:01,042 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 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 [2021-06-05 05:45:01,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:01,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:45:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:01,447 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:01,447 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 29 treesize of output 17 [2021-06-05 05:45:01,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:01,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:01,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:01,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:45:01,592 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:01,592 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 25 treesize of output 13 [2021-06-05 05:45:01,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:01,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:01,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:01,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:45:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:01,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735837456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:01,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:01,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 05:45:01,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713605198] [2021-06-05 05:45:01,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:45:01,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:45:01,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:45:01,690 INFO L87 Difference]: Start difference. First operand 10944 states and 36359 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:03,935 INFO L93 Difference]: Finished difference Result 26668 states and 88897 transitions. [2021-06-05 05:45:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:45:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:45:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:03,990 INFO L225 Difference]: With dead ends: 26668 [2021-06-05 05:45:03,991 INFO L226 Difference]: Without dead ends: 26368 [2021-06-05 05:45:03,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1792.7ms TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:45:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26368 states. [2021-06-05 05:45:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26368 to 11105. [2021-06-05 05:45:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 11104 states have (on average 3.3218659942363113) internal successors, (36886), 11104 states have internal predecessors, (36886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 36886 transitions. [2021-06-05 05:45:04,248 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 36886 transitions. Word has length 47 [2021-06-05 05:45:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:04,248 INFO L482 AbstractCegarLoop]: Abstraction has 11105 states and 36886 transitions. [2021-06-05 05:45:04,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 36886 transitions. [2021-06-05 05:45:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:45:04,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:04,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:04,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 05:45:04,464 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1161766054, now seen corresponding path program 35 times [2021-06-05 05:45:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:04,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250626915] [2021-06-05 05:45:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:04,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:04,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250626915] [2021-06-05 05:45:04,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250626915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:04,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707959712] [2021-06-05 05:45:04,749 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 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 [2021-06-05 05:45:04,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:45:04,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:04,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:04,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:05,082 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:05,082 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 29 treesize of output 17 [2021-06-05 05:45:05,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:05,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:05,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:05,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:45:05,246 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:05,246 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 25 treesize of output 13 [2021-06-05 05:45:05,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:05,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:05,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:05,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:45:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:05,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707959712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:05,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:05,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 05:45:05,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705353868] [2021-06-05 05:45:05,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:45:05,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:45:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:45:05,318 INFO L87 Difference]: Start difference. First operand 11105 states and 36886 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:08,336 INFO L93 Difference]: Finished difference Result 32478 states and 107950 transitions. [2021-06-05 05:45:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:45:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:45:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:08,401 INFO L225 Difference]: With dead ends: 32478 [2021-06-05 05:45:08,401 INFO L226 Difference]: Without dead ends: 32178 [2021-06-05 05:45:08,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2376.4ms TimeCoverageRelationStatistics Valid=1265, Invalid=7477, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:45:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32178 states. [2021-06-05 05:45:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32178 to 10959. [2021-06-05 05:45:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 10958 states have (on average 3.322139076473809) internal successors, (36404), 10958 states have internal predecessors, (36404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 36404 transitions. [2021-06-05 05:45:08,698 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 36404 transitions. Word has length 47 [2021-06-05 05:45:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:08,698 INFO L482 AbstractCegarLoop]: Abstraction has 10959 states and 36404 transitions. [2021-06-05 05:45:08,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 36404 transitions. [2021-06-05 05:45:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:45:08,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:08,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:08,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:45:08,915 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1559125806, now seen corresponding path program 36 times [2021-06-05 05:45:08,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:08,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006333940] [2021-06-05 05:45:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:09,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:09,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006333940] [2021-06-05 05:45:09,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006333940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:09,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983552212] [2021-06-05 05:45:09,216 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 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 [2021-06-05 05:45:09,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:45:09,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:45:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:09,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:09,572 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 29 treesize of output 17 [2021-06-05 05:45:09,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:09,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:09,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:09,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:45:09,719 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:09,719 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 25 treesize of output 13 [2021-06-05 05:45:09,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:09,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:09,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:09,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:45:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:09,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983552212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:09,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:09,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 05:45:09,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295484652] [2021-06-05 05:45:09,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:45:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:45:09,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:45:09,789 INFO L87 Difference]: Start difference. First operand 10959 states and 36404 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:11,971 INFO L93 Difference]: Finished difference Result 26320 states and 87742 transitions. [2021-06-05 05:45:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:45:11,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:45:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:12,022 INFO L225 Difference]: With dead ends: 26320 [2021-06-05 05:45:12,023 INFO L226 Difference]: Without dead ends: 26020 [2021-06-05 05:45:12,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1764.3ms TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:45:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2021-06-05 05:45:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 10970. [2021-06-05 05:45:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10969 states have (on average 3.322271857051691) internal successors, (36442), 10969 states have internal predecessors, (36442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 36442 transitions. [2021-06-05 05:45:12,256 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 36442 transitions. Word has length 47 [2021-06-05 05:45:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:12,256 INFO L482 AbstractCegarLoop]: Abstraction has 10970 states and 36442 transitions. [2021-06-05 05:45:12,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 36442 transitions. [2021-06-05 05:45:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:45:12,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:12,270 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:12,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:45:12,470 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:12,471 INFO L82 PathProgramCache]: Analyzing trace with hash 641046796, now seen corresponding path program 37 times [2021-06-05 05:45:12,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:12,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794229760] [2021-06-05 05:45:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:12,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:12,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794229760] [2021-06-05 05:45:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794229760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:12,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955004948] [2021-06-05 05:45:12,857 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 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 [2021-06-05 05:45:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:45:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:13,208 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:13,209 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 29 treesize of output 17 [2021-06-05 05:45:13,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:13,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:13,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:13,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:45:13,339 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:13,339 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 25 treesize of output 13 [2021-06-05 05:45:13,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:13,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:13,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:13,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:45:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955004948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 05:45:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273687674] [2021-06-05 05:45:13,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:45:13,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:45:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:45:13,413 INFO L87 Difference]: Start difference. First operand 10970 states and 36442 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:16,345 INFO L93 Difference]: Finished difference Result 31704 states and 105322 transitions. [2021-06-05 05:45:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:45:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:45:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:16,409 INFO L225 Difference]: With dead ends: 31704 [2021-06-05 05:45:16,409 INFO L226 Difference]: Without dead ends: 31404 [2021-06-05 05:45:16,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2403.1ms TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:45:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31404 states. [2021-06-05 05:45:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31404 to 10809. [2021-06-05 05:45:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 3.3230014803849) internal successors, (35915), 10808 states have internal predecessors, (35915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 35915 transitions. [2021-06-05 05:45:16,694 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 35915 transitions. Word has length 47 [2021-06-05 05:45:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:16,694 INFO L482 AbstractCegarLoop]: Abstraction has 10809 states and 35915 transitions. [2021-06-05 05:45:16,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 35915 transitions. [2021-06-05 05:45:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:45:16,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:16,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:16,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:45:16,909 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash -590498608, now seen corresponding path program 38 times [2021-06-05 05:45:16,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:16,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122938950] [2021-06-05 05:45:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:45:16,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:16,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122938950] [2021-06-05 05:45:16,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122938950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:16,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899678309] [2021-06-05 05:45:16,933 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 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 [2021-06-05 05:45:16,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:16,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:16,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:45:16,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:45:17,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899678309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:17,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:17,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:45:17,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631453582] [2021-06-05 05:45:17,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:45:17,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:45:17,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:45:17,046 INFO L87 Difference]: Start difference. First operand 10809 states and 35915 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:17,123 INFO L93 Difference]: Finished difference Result 18453 states and 61519 transitions. [2021-06-05 05:45:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:45:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 05:45:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:17,157 INFO L225 Difference]: With dead ends: 18453 [2021-06-05 05:45:17,157 INFO L226 Difference]: Without dead ends: 17839 [2021-06-05 05:45:17,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:45:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2021-06-05 05:45:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 12699. [2021-06-05 05:45:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12699 states, 12698 states have (on average 3.361946763269806) internal successors, (42690), 12698 states have internal predecessors, (42690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12699 states to 12699 states and 42690 transitions. [2021-06-05 05:45:17,383 INFO L78 Accepts]: Start accepts. Automaton has 12699 states and 42690 transitions. Word has length 51 [2021-06-05 05:45:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:17,383 INFO L482 AbstractCegarLoop]: Abstraction has 12699 states and 42690 transitions. [2021-06-05 05:45:17,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12699 states and 42690 transitions. [2021-06-05 05:45:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:45:17,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:17,402 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:17,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:17,603 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1803464833, now seen corresponding path program 39 times [2021-06-05 05:45:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:17,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047757346] [2021-06-05 05:45:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:17,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:17,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047757346] [2021-06-05 05:45:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047757346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:17,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919362744] [2021-06-05 05:45:17,923 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 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 [2021-06-05 05:45:17,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:45:17,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:18,295 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:45:18,295 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 35 treesize of output 19 [2021-06-05 05:45:18,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:18,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:18,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:18,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:29 [2021-06-05 05:45:18,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:18,450 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 25 treesize of output 13 [2021-06-05 05:45:18,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:18,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:18,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:18,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:45:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:18,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919362744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:18,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:18,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 05:45:18,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905714269] [2021-06-05 05:45:18,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:45:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:18,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:45:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:45:18,598 INFO L87 Difference]: Start difference. First operand 12699 states and 42690 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:26,355 INFO L93 Difference]: Finished difference Result 86229 states and 293816 transitions. [2021-06-05 05:45:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-06-05 05:45:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 05:45:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:26,554 INFO L225 Difference]: With dead ends: 86229 [2021-06-05 05:45:26,554 INFO L226 Difference]: Without dead ends: 84335 [2021-06-05 05:45:26,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18200 ImplicationChecksByTransitivity, 5881.7ms TimeCoverageRelationStatistics Valid=5140, Invalid=40442, Unknown=0, NotChecked=0, Total=45582 [2021-06-05 05:45:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84335 states. [2021-06-05 05:45:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84335 to 13212. [2021-06-05 05:45:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13211 states have (on average 3.3770342896071455) internal successors, (44614), 13211 states have internal predecessors, (44614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 44614 transitions. [2021-06-05 05:45:27,339 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 44614 transitions. Word has length 51 [2021-06-05 05:45:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:27,339 INFO L482 AbstractCegarLoop]: Abstraction has 13212 states and 44614 transitions. [2021-06-05 05:45:27,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 44614 transitions. [2021-06-05 05:45:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:45:27,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:27,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:27,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:27,560 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash -746735621, now seen corresponding path program 40 times [2021-06-05 05:45:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492697398] [2021-06-05 05:45:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:27,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492697398] [2021-06-05 05:45:27,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492697398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422756577] [2021-06-05 05:45:27,885 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 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 [2021-06-05 05:45:27,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:28,213 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:45:28,214 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 35 treesize of output 19 [2021-06-05 05:45:28,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:28,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:28,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:28,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:29 [2021-06-05 05:45:28,400 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:28,400 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 25 treesize of output 13 [2021-06-05 05:45:28,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:28,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:28,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:28,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 05:45:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422756577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 05:45:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835926490] [2021-06-05 05:45:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:45:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:45:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:45:28,472 INFO L87 Difference]: Start difference. First operand 13212 states and 44614 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:36,211 INFO L93 Difference]: Finished difference Result 80772 states and 276597 transitions. [2021-06-05 05:45:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-06-05 05:45:36,212 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 05:45:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:36,391 INFO L225 Difference]: With dead ends: 80772 [2021-06-05 05:45:36,391 INFO L226 Difference]: Without dead ends: 78736 [2021-06-05 05:45:36,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 5517.4ms TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-06-05 05:45:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78736 states. [2021-06-05 05:45:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78736 to 13623. [2021-06-05 05:45:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13623 states, 13622 states have (on average 3.3828365878725593) internal successors, (46081), 13622 states have internal predecessors, (46081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 46081 transitions. [2021-06-05 05:45:37,065 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 46081 transitions. Word has length 51 [2021-06-05 05:45:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:37,065 INFO L482 AbstractCegarLoop]: Abstraction has 13623 states and 46081 transitions. [2021-06-05 05:45:37,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 46081 transitions. [2021-06-05 05:45:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:45:37,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:37,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:37,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:37,286 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash 643422605, now seen corresponding path program 41 times [2021-06-05 05:45:37,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:37,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838683624] [2021-06-05 05:45:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:45:37,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838683624] [2021-06-05 05:45:37,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838683624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688802320] [2021-06-05 05:45:37,723 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 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 [2021-06-05 05:45:37,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:45:37,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:45:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:38,554 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:45:38,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:45:38,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:38,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:38,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:38,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:42 [2021-06-05 05:45:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:38,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:38,670 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 18 [2021-06-05 05:45:38,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:38,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:38,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:38,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 05:45:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:38,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688802320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:38,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:38,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-06-05 05:45:38,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428973642] [2021-06-05 05:45:38,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:45:38,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:45:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:45:38,755 INFO L87 Difference]: Start difference. First operand 13623 states and 46081 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:50,021 INFO L93 Difference]: Finished difference Result 92840 states and 316083 transitions. [2021-06-05 05:45:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-06-05 05:45:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:45:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:50,213 INFO L225 Difference]: With dead ends: 92840 [2021-06-05 05:45:50,213 INFO L226 Difference]: Without dead ends: 88224 [2021-06-05 05:45:50,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21094 ImplicationChecksByTransitivity, 9249.9ms TimeCoverageRelationStatistics Valid=5822, Invalid=46848, Unknown=0, NotChecked=0, Total=52670 [2021-06-05 05:45:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88224 states. [2021-06-05 05:45:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88224 to 14423. [2021-06-05 05:45:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14423 states, 14422 states have (on average 3.370891693246429) internal successors, (48615), 14422 states have internal predecessors, (48615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14423 states to 14423 states and 48615 transitions. [2021-06-05 05:45:51,349 INFO L78 Accepts]: Start accepts. Automaton has 14423 states and 48615 transitions. Word has length 54 [2021-06-05 05:45:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:51,350 INFO L482 AbstractCegarLoop]: Abstraction has 14423 states and 48615 transitions. [2021-06-05 05:45:51,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 14423 states and 48615 transitions. [2021-06-05 05:45:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:45:51,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:51,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:51,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 05:45:51,569 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1581400071, now seen corresponding path program 42 times [2021-06-05 05:45:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:51,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577517805] [2021-06-05 05:45:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:45:51,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577517805] [2021-06-05 05:45:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577517805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470754218] [2021-06-05 05:45:51,983 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 [2021-06-05 05:45:52,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:45:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:45:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:52,591 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:45:52,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:45:52,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:52,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:52,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:52,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:45:52,772 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:45:52,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:45:52,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:52,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:52,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:52,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:45:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:52,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470754218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:52,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:52,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:45:52,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323228652] [2021-06-05 05:45:52,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:52,858 INFO L87 Difference]: Start difference. First operand 14423 states and 48615 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:03,297 INFO L93 Difference]: Finished difference Result 91747 states and 309740 transitions. [2021-06-05 05:46:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-06-05 05:46:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:46:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:03,783 INFO L225 Difference]: With dead ends: 91747 [2021-06-05 05:46:03,783 INFO L226 Difference]: Without dead ends: 90897 [2021-06-05 05:46:03,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19894 ImplicationChecksByTransitivity, 8150.9ms TimeCoverageRelationStatistics Valid=5038, Invalid=45812, Unknown=0, NotChecked=0, Total=50850 [2021-06-05 05:46:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90897 states. [2021-06-05 05:46:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90897 to 15287. [2021-06-05 05:46:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 15286 states have (on average 3.3639931963888525) internal successors, (51422), 15286 states have internal predecessors, (51422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 51422 transitions. [2021-06-05 05:46:04,726 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 51422 transitions. Word has length 54 [2021-06-05 05:46:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:04,726 INFO L482 AbstractCegarLoop]: Abstraction has 15287 states and 51422 transitions. [2021-06-05 05:46:04,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 51422 transitions. [2021-06-05 05:46:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:46:04,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:04,773 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:04,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:04,975 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2088723877, now seen corresponding path program 43 times [2021-06-05 05:46:04,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:04,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633533659] [2021-06-05 05:46:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:46:05,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:05,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633533659] [2021-06-05 05:46:05,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633533659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622726261] [2021-06-05 05:46:05,351 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 [2021-06-05 05:46:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:46:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:06,011 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:06,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 05:46:06,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:06,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:06,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:06,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 05:46:06,182 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:46:06,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:06,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:06,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:06,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:46:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:06,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622726261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:06,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:06,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:46:06,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825031907] [2021-06-05 05:46:06,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:06,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:06,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:06,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:06,265 INFO L87 Difference]: Start difference. First operand 15287 states and 51422 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:18,655 INFO L93 Difference]: Finished difference Result 101039 states and 340837 transitions. [2021-06-05 05:46:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-06-05 05:46:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:46:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:18,888 INFO L225 Difference]: With dead ends: 101039 [2021-06-05 05:46:18,888 INFO L226 Difference]: Without dead ends: 100149 [2021-06-05 05:46:18,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25131 ImplicationChecksByTransitivity, 10067.9ms TimeCoverageRelationStatistics Valid=6462, Invalid=56288, Unknown=0, NotChecked=0, Total=62750 [2021-06-05 05:46:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100149 states. [2021-06-05 05:46:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100149 to 15370. [2021-06-05 05:46:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15370 states, 15369 states have (on average 3.364695165593077) internal successors, (51712), 15369 states have internal predecessors, (51712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 51712 transitions. [2021-06-05 05:46:20,020 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 51712 transitions. Word has length 54 [2021-06-05 05:46:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:20,020 INFO L482 AbstractCegarLoop]: Abstraction has 15370 states and 51712 transitions. [2021-06-05 05:46:20,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 51712 transitions. [2021-06-05 05:46:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:46:20,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:20,041 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:20,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:46:20,245 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1288164409, now seen corresponding path program 44 times [2021-06-05 05:46:20,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:20,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794733942] [2021-06-05 05:46:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:46:20,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:20,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794733942] [2021-06-05 05:46:20,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794733942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:20,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673744736] [2021-06-05 05:46:20,604 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 [2021-06-05 05:46:20,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:46:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:21,264 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:21,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 05:46:21,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:21,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:21,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:21,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 05:46:21,448 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:21,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:46:21,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:21,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:21,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:21,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:46:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:21,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673744736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:21,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:21,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:46:21,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386633323] [2021-06-05 05:46:21,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:21,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:21,626 INFO L87 Difference]: Start difference. First operand 15370 states and 51712 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:35,156 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-06-05 05:46:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:36,521 INFO L93 Difference]: Finished difference Result 124978 states and 424154 transitions. [2021-06-05 05:46:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-06-05 05:46:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:46:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:36,822 INFO L225 Difference]: With dead ends: 124978 [2021-06-05 05:46:36,823 INFO L226 Difference]: Without dead ends: 121408 [2021-06-05 05:46:36,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35074 ImplicationChecksByTransitivity, 12566.0ms TimeCoverageRelationStatistics Valid=8395, Invalid=75415, Unknown=0, NotChecked=0, Total=83810 [2021-06-05 05:46:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121408 states. [2021-06-05 05:46:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121408 to 17376. [2021-06-05 05:46:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17375 states have (on average 3.3524028776978416) internal successors, (58248), 17375 states have internal predecessors, (58248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 58248 transitions. [2021-06-05 05:46:38,204 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 58248 transitions. Word has length 54 [2021-06-05 05:46:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:38,204 INFO L482 AbstractCegarLoop]: Abstraction has 17376 states and 58248 transitions. [2021-06-05 05:46:38,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 58248 transitions. [2021-06-05 05:46:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:46:38,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:38,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:38,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:46:38,428 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1594702095, now seen corresponding path program 45 times [2021-06-05 05:46:38,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:38,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126831295] [2021-06-05 05:46:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:46:38,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:38,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126831295] [2021-06-05 05:46:38,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126831295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:38,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99742924] [2021-06-05 05:46:38,837 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 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 [2021-06-05 05:46:38,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:46:38,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:46:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:39,518 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:39,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:46:39,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:39,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:39,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:39,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:46:39,654 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:46:39,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:39,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:39,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:39,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:46:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:39,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99742924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:39,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:39,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:46:39,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391939401] [2021-06-05 05:46:39,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:39,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:39,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:39,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:39,835 INFO L87 Difference]: Start difference. First operand 17376 states and 58248 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:50,847 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-06-05 05:46:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:51,335 INFO L93 Difference]: Finished difference Result 100564 states and 339046 transitions. [2021-06-05 05:46:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-06-05 05:46:51,335 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:46:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:51,556 INFO L225 Difference]: With dead ends: 100564 [2021-06-05 05:46:51,556 INFO L226 Difference]: Without dead ends: 99734 [2021-06-05 05:46:51,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22988 ImplicationChecksByTransitivity, 9410.7ms TimeCoverageRelationStatistics Valid=5801, Invalid=52039, Unknown=0, NotChecked=0, Total=57840 [2021-06-05 05:46:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99734 states. [2021-06-05 05:46:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99734 to 17519. [2021-06-05 05:46:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 3.3529512501427106) internal successors, (58737), 17518 states have internal predecessors, (58737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 58737 transitions. [2021-06-05 05:46:52,631 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 58737 transitions. Word has length 54 [2021-06-05 05:46:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:52,631 INFO L482 AbstractCegarLoop]: Abstraction has 17519 states and 58737 transitions. [2021-06-05 05:46:52,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 58737 transitions. [2021-06-05 05:46:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:46:52,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:52,654 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:52,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:46:52,865 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash 676623085, now seen corresponding path program 46 times [2021-06-05 05:46:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:52,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824353513] [2021-06-05 05:46:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:46:53,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824353513] [2021-06-05 05:46:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824353513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114365215] [2021-06-05 05:46:53,282 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 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 [2021-06-05 05:46:53,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:53,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:53,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:46:53,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:53,995 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:53,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:46:53,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:54,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:54,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:54,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:46:54,128 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:46:54,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:46:54,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:54,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:54,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:54,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:46:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114365215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:54,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:54,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:46:54,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975467452] [2021-06-05 05:46:54,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:46:54,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:46:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:46:54,208 INFO L87 Difference]: Start difference. First operand 17519 states and 58737 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:08,939 INFO L93 Difference]: Finished difference Result 106844 states and 359808 transitions. [2021-06-05 05:47:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-06-05 05:47:08,940 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:47:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:09,190 INFO L225 Difference]: With dead ends: 106844 [2021-06-05 05:47:09,190 INFO L226 Difference]: Without dead ends: 105974 [2021-06-05 05:47:09,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32263 ImplicationChecksByTransitivity, 11683.1ms TimeCoverageRelationStatistics Valid=7783, Invalid=69779, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 05:47:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105974 states. [2021-06-05 05:47:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105974 to 16906. [2021-06-05 05:47:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16906 states, 16905 states have (on average 3.3510795622596863) internal successors, (56650), 16905 states have internal predecessors, (56650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16906 states to 16906 states and 56650 transitions. [2021-06-05 05:47:10,395 INFO L78 Accepts]: Start accepts. Automaton has 16906 states and 56650 transitions. Word has length 54 [2021-06-05 05:47:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:10,395 INFO L482 AbstractCegarLoop]: Abstraction has 16906 states and 56650 transitions. [2021-06-05 05:47:10,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 16906 states and 56650 transitions. [2021-06-05 05:47:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:47:10,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:10,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:10,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 05:47:10,633 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1343056893, now seen corresponding path program 47 times [2021-06-05 05:47:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:10,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431984816] [2021-06-05 05:47:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:47:11,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:11,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431984816] [2021-06-05 05:47:11,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431984816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:11,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396465910] [2021-06-05 05:47:11,018 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 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 [2021-06-05 05:47:11,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:47:11,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:47:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:11,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:47:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:11,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:11,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:47:11,919 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 31 [2021-06-05 05:47:11,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:11,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:11,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:11,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:37 [2021-06-05 05:47:12,028 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:12,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:47:12,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:12,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:12,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:12,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:47:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:12,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396465910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:12,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:12,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:47:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184217241] [2021-06-05 05:47:12,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:47:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:47:12,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:47:12,143 INFO L87 Difference]: Start difference. First operand 16906 states and 56650 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:23,638 INFO L93 Difference]: Finished difference Result 86669 states and 292345 transitions. [2021-06-05 05:47:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 05:47:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:47:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:23,828 INFO L225 Difference]: With dead ends: 86669 [2021-06-05 05:47:23,828 INFO L226 Difference]: Without dead ends: 85459 [2021-06-05 05:47:23,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20939 ImplicationChecksByTransitivity, 9452.6ms TimeCoverageRelationStatistics Valid=5562, Invalid=48030, Unknown=0, NotChecked=0, Total=53592 [2021-06-05 05:47:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85459 states. [2021-06-05 05:47:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85459 to 16784. [2021-06-05 05:47:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 16783 states have (on average 3.352320800810344) internal successors, (56262), 16783 states have internal predecessors, (56262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 56262 transitions. [2021-06-05 05:47:24,718 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 56262 transitions. Word has length 54 [2021-06-05 05:47:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:24,718 INFO L482 AbstractCegarLoop]: Abstraction has 16784 states and 56262 transitions. [2021-06-05 05:47:24,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 56262 transitions. [2021-06-05 05:47:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:47:24,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:24,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:24,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:24,943 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash 770927037, now seen corresponding path program 48 times [2021-06-05 05:47:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:24,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70161464] [2021-06-05 05:47:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:47:25,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70161464] [2021-06-05 05:47:25,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70161464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769809782] [2021-06-05 05:47:25,390 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 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 [2021-06-05 05:47:25,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:47:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:25,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:47:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:26,224 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:26,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:47:26,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:26,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:26,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:26,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:47:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:26,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:47:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:47:26,480 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 36 treesize of output 18 [2021-06-05 05:47:26,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:26,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:26,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:26,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 05:47:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:26,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769809782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:26,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:26,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:47:26,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438809688] [2021-06-05 05:47:26,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:47:26,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:47:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:47:26,572 INFO L87 Difference]: Start difference. First operand 16784 states and 56262 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:39,147 INFO L93 Difference]: Finished difference Result 91509 states and 308567 transitions. [2021-06-05 05:47:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-05 05:47:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:47:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:39,345 INFO L225 Difference]: With dead ends: 91509 [2021-06-05 05:47:39,345 INFO L226 Difference]: Without dead ends: 90649 [2021-06-05 05:47:39,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23550 ImplicationChecksByTransitivity, 9601.2ms TimeCoverageRelationStatistics Valid=5558, Invalid=55204, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 05:47:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90649 states. [2021-06-05 05:47:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90649 to 17604. [2021-06-05 05:47:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17604 states, 17603 states have (on average 3.3469295006532978) internal successors, (58916), 17603 states have internal predecessors, (58916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17604 states to 17604 states and 58916 transitions. [2021-06-05 05:47:40,180 INFO L78 Accepts]: Start accepts. Automaton has 17604 states and 58916 transitions. Word has length 54 [2021-06-05 05:47:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:40,180 INFO L482 AbstractCegarLoop]: Abstraction has 17604 states and 58916 transitions. [2021-06-05 05:47:40,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 17604 states and 58916 transitions. [2021-06-05 05:47:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:47:40,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:40,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:40,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 05:47:40,404 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash -347938093, now seen corresponding path program 49 times [2021-06-05 05:47:40,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:40,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443737021] [2021-06-05 05:47:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:47:40,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:40,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443737021] [2021-06-05 05:47:40,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443737021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:40,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526352356] [2021-06-05 05:47:40,776 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 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 [2021-06-05 05:47:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:40,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:47:40,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:41,421 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:41,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:47:41,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:41,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:41,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:41,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:47:41,573 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:41,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:47:41,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:41,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:41,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:41,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:47:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:41,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526352356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:41,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:41,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:47:41,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779129160] [2021-06-05 05:47:41,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:47:41,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:41,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:47:41,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:47:41,658 INFO L87 Difference]: Start difference. First operand 17604 states and 58916 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:45,610 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 05:47:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:52,827 INFO L93 Difference]: Finished difference Result 77944 states and 263222 transitions. [2021-06-05 05:47:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-06-05 05:47:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:47:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:52,992 INFO L225 Difference]: With dead ends: 77944 [2021-06-05 05:47:52,992 INFO L226 Difference]: Without dead ends: 77094 [2021-06-05 05:47:52,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18674 ImplicationChecksByTransitivity, 8892.7ms TimeCoverageRelationStatistics Valid=5058, Invalid=44004, Unknown=0, NotChecked=0, Total=49062 [2021-06-05 05:47:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77094 states. [2021-06-05 05:47:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77094 to 18339. [2021-06-05 05:47:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 3.3434943832479007) internal successors, (61313), 18338 states have internal predecessors, (61313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 61313 transitions. [2021-06-05 05:47:53,699 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 61313 transitions. Word has length 54 [2021-06-05 05:47:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:53,699 INFO L482 AbstractCegarLoop]: Abstraction has 18339 states and 61313 transitions. [2021-06-05 05:47:53,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 61313 transitions. [2021-06-05 05:47:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:47:53,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:53,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:53,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:53,925 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1720996819, now seen corresponding path program 50 times [2021-06-05 05:47:53,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:53,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561335954] [2021-06-05 05:47:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:47:54,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:54,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561335954] [2021-06-05 05:47:54,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561335954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:54,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207757283] [2021-06-05 05:47:54,378 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 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 [2021-06-05 05:47:54,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:54,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:47:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:54,991 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:54,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:47:54,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:55,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:55,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:55,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:47:55,173 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:55,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:47:55,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:55,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:55,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:55,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:47:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:55,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207757283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:55,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:55,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:47:55,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636405033] [2021-06-05 05:47:55,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:47:55,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:55,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:47:55,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:47:55,259 INFO L87 Difference]: Start difference. First operand 18339 states and 61313 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:00,279 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 05:48:04,453 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 05:48:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:06,953 INFO L93 Difference]: Finished difference Result 91695 states and 308842 transitions. [2021-06-05 05:48:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 05:48:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:48:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:07,157 INFO L225 Difference]: With dead ends: 91695 [2021-06-05 05:48:07,157 INFO L226 Difference]: Without dead ends: 90875 [2021-06-05 05:48:07,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20016 ImplicationChecksByTransitivity, 8415.1ms TimeCoverageRelationStatistics Valid=4724, Invalid=48406, Unknown=0, NotChecked=0, Total=53130 [2021-06-05 05:48:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-06-05 05:48:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 18867. [2021-06-05 05:48:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18867 states, 18866 states have (on average 3.336319304569066) internal successors, (62943), 18866 states have internal predecessors, (62943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18867 states to 18867 states and 62943 transitions. [2021-06-05 05:48:08,068 INFO L78 Accepts]: Start accepts. Automaton has 18867 states and 62943 transitions. Word has length 54 [2021-06-05 05:48:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:08,068 INFO L482 AbstractCegarLoop]: Abstraction has 18867 states and 62943 transitions. [2021-06-05 05:48:08,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 18867 states and 62943 transitions. [2021-06-05 05:48:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:48:08,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:08,094 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:08,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:08,294 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:08,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1213673013, now seen corresponding path program 51 times [2021-06-05 05:48:08,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:08,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170818279] [2021-06-05 05:48:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:48:08,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:08,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170818279] [2021-06-05 05:48:08,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170818279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:08,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065883596] [2021-06-05 05:48:08,751 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 [2021-06-05 05:48:08,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:48:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:09,398 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:09,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:48:09,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:09,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:09,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:09,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:48:09,580 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:09,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:09,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:09,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:09,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:09,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:48:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:09,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065883596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:09,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:09,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:48:09,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260590691] [2021-06-05 05:48:09,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:48:09,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:48:09,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:09,665 INFO L87 Difference]: Start difference. First operand 18867 states and 62943 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:15,489 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-05 05:48:19,575 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-05 05:48:23,951 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 05:48:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:24,463 INFO L93 Difference]: Finished difference Result 116913 states and 393329 transitions. [2021-06-05 05:48:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-06-05 05:48:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:48:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:24,731 INFO L225 Difference]: With dead ends: 116913 [2021-06-05 05:48:24,731 INFO L226 Difference]: Without dead ends: 116083 [2021-06-05 05:48:24,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29781 ImplicationChecksByTransitivity, 11490.1ms TimeCoverageRelationStatistics Valid=6740, Invalid=69160, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 05:48:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116083 states. [2021-06-05 05:48:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116083 to 20115. [2021-06-05 05:48:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 3.33016804215969) internal successors, (66983), 20114 states have internal predecessors, (66983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 66983 transitions. [2021-06-05 05:48:25,648 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 66983 transitions. Word has length 54 [2021-06-05 05:48:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:25,648 INFO L482 AbstractCegarLoop]: Abstraction has 20115 states and 66983 transitions. [2021-06-05 05:48:25,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 66983 transitions. [2021-06-05 05:48:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:48:25,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:25,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:25,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 05:48:25,874 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash 295594003, now seen corresponding path program 52 times [2021-06-05 05:48:25,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:25,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148206051] [2021-06-05 05:48:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:48:26,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:26,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148206051] [2021-06-05 05:48:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148206051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:26,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603920309] [2021-06-05 05:48:26,256 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 [2021-06-05 05:48:26,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:26,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:48:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:26,766 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 05:48:27,179 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:27,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 05:48:27,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:27,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 05:48:27,543 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 05:48:27,549 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:27,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:27,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:48:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:27,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603920309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:27,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:27,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:48:27,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465452462] [2021-06-05 05:48:27,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:48:27,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:27,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:48:27,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:27,633 INFO L87 Difference]: Start difference. First operand 20115 states and 66983 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:43,064 INFO L93 Difference]: Finished difference Result 124269 states and 417429 transitions. [2021-06-05 05:48:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 05:48:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:48:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:43,350 INFO L225 Difference]: With dead ends: 124269 [2021-06-05 05:48:43,351 INFO L226 Difference]: Without dead ends: 122609 [2021-06-05 05:48:43,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28590 ImplicationChecksByTransitivity, 11731.7ms TimeCoverageRelationStatistics Valid=6899, Invalid=66271, Unknown=0, NotChecked=0, Total=73170 [2021-06-05 05:48:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122609 states. [2021-06-05 05:48:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122609 to 21964. [2021-06-05 05:48:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21964 states, 21963 states have (on average 3.322087146564677) internal successors, (72963), 21963 states have internal predecessors, (72963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21964 states to 21964 states and 72963 transitions. [2021-06-05 05:48:44,698 INFO L78 Accepts]: Start accepts. Automaton has 21964 states and 72963 transitions. Word has length 54 [2021-06-05 05:48:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:44,698 INFO L482 AbstractCegarLoop]: Abstraction has 21964 states and 72963 transitions. [2021-06-05 05:48:44,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 21964 states and 72963 transitions. [2021-06-05 05:48:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:48:44,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:44,726 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:44,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 05:48:44,927 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash 350486487, now seen corresponding path program 53 times [2021-06-05 05:48:44,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:44,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996239543] [2021-06-05 05:48:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:48:45,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:45,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996239543] [2021-06-05 05:48:45,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996239543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508301841] [2021-06-05 05:48:45,324 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 [2021-06-05 05:48:45,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:48:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:45,996 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:45,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:48:45,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:46,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 05:48:46,094 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:46,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:46,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:46,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:48:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:46,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508301841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:46,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:46,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:48:46,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063760984] [2021-06-05 05:48:46,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:48:46,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:48:46,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:46,178 INFO L87 Difference]: Start difference. First operand 21964 states and 72963 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:53,944 INFO L93 Difference]: Finished difference Result 69919 states and 235479 transitions. [2021-06-05 05:48:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 05:48:53,944 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:48:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:54,087 INFO L225 Difference]: With dead ends: 69919 [2021-06-05 05:48:54,088 INFO L226 Difference]: Without dead ends: 68859 [2021-06-05 05:48:54,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11074 ImplicationChecksByTransitivity, 5873.1ms TimeCoverageRelationStatistics Valid=3234, Invalid=27918, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 05:48:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68859 states. [2021-06-05 05:48:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68859 to 22062. [2021-06-05 05:48:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22062 states, 22061 states have (on average 3.3209736639318255) internal successors, (73264), 22061 states have internal predecessors, (73264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 73264 transitions. [2021-06-05 05:48:54,797 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 73264 transitions. Word has length 54 [2021-06-05 05:48:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:54,797 INFO L482 AbstractCegarLoop]: Abstraction has 22062 states and 73264 transitions. [2021-06-05 05:48:54,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 73264 transitions. [2021-06-05 05:48:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:48:54,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:54,827 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:55,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:55,027 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1417516959, now seen corresponding path program 54 times [2021-06-05 05:48:55,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:55,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221621904] [2021-06-05 05:48:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:48:55,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:55,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221621904] [2021-06-05 05:48:55,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221621904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:55,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048885512] [2021-06-05 05:48:55,382 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 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 [2021-06-05 05:48:55,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:48:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:48:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:56,062 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:56,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:48:56,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:56,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:48:56,360 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:56,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:56,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:56,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:48:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048885512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:56,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:56,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:48:56,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60861074] [2021-06-05 05:48:56,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:48:56,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:48:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:48:56,440 INFO L87 Difference]: Start difference. First operand 22062 states and 73264 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:09,339 INFO L93 Difference]: Finished difference Result 150720 states and 516372 transitions. [2021-06-05 05:49:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 05:49:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:49:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:09,682 INFO L225 Difference]: With dead ends: 150720 [2021-06-05 05:49:09,682 INFO L226 Difference]: Without dead ends: 145955 [2021-06-05 05:49:09,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28507 ImplicationChecksByTransitivity, 10513.6ms TimeCoverageRelationStatistics Valid=7069, Invalid=62891, Unknown=0, NotChecked=0, Total=69960 [2021-06-05 05:49:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145955 states. [2021-06-05 05:49:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145955 to 25238. [2021-06-05 05:49:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25238 states, 25237 states have (on average 3.303245235170583) internal successors, (83364), 25237 states have internal predecessors, (83364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25238 states to 25238 states and 83364 transitions. [2021-06-05 05:49:11,402 INFO L78 Accepts]: Start accepts. Automaton has 25238 states and 83364 transitions. Word has length 54 [2021-06-05 05:49:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:11,402 INFO L482 AbstractCegarLoop]: Abstraction has 25238 states and 83364 transitions. [2021-06-05 05:49:11,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 25238 states and 83364 transitions. [2021-06-05 05:49:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:49:11,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:11,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:11,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:49:11,636 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash 668210515, now seen corresponding path program 55 times [2021-06-05 05:49:11,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:11,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866636130] [2021-06-05 05:49:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:49:12,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:12,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866636130] [2021-06-05 05:49:12,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866636130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:12,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781821355] [2021-06-05 05:49:12,062 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 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 [2021-06-05 05:49:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:49:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:12,441 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-06-05 05:49:12,788 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:49:12,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 05:49:12,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:12,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:12,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:12,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 05:49:12,953 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:49:12,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:12,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:12,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:12,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:12,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:49:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:13,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781821355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:13,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:13,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 05:49:13,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054056963] [2021-06-05 05:49:13,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:49:13,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:49:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:49:13,032 INFO L87 Difference]: Start difference. First operand 25238 states and 83364 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:24,475 INFO L93 Difference]: Finished difference Result 105434 states and 354160 transitions. [2021-06-05 05:49:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 05:49:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:49:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:24,723 INFO L225 Difference]: With dead ends: 105434 [2021-06-05 05:49:24,723 INFO L226 Difference]: Without dead ends: 104584 [2021-06-05 05:49:24,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23552 ImplicationChecksByTransitivity, 9012.8ms TimeCoverageRelationStatistics Valid=5754, Invalid=53538, Unknown=0, NotChecked=0, Total=59292 [2021-06-05 05:49:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104584 states. [2021-06-05 05:49:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104584 to 26860. [2021-06-05 05:49:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26860 states, 26859 states have (on average 3.29863360512305) internal successors, (88598), 26859 states have internal predecessors, (88598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26860 states to 26860 states and 88598 transitions. [2021-06-05 05:49:25,921 INFO L78 Accepts]: Start accepts. Automaton has 26860 states and 88598 transitions. Word has length 54 [2021-06-05 05:49:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:25,921 INFO L482 AbstractCegarLoop]: Abstraction has 26860 states and 88598 transitions. [2021-06-05 05:49:25,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 26860 states and 88598 transitions. [2021-06-05 05:49:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:49:25,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:25,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:26,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:49:26,163 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash 160886709, now seen corresponding path program 56 times [2021-06-05 05:49:26,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:26,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271597922] [2021-06-05 05:49:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:49:26,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271597922] [2021-06-05 05:49:26,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271597922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082751052] [2021-06-05 05:49:26,621 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 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 [2021-06-05 05:49:26,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:26,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:26,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:49:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:27,325 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:49:27,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:49:27,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:27,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:27,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:27,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:49:27,501 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:49:27,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:27,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:27,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:27,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:27,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:49:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:27,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082751052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:27,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:27,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 05:49:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706592290] [2021-06-05 05:49:27,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:49:27,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:49:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:49:27,582 INFO L87 Difference]: Start difference. First operand 26860 states and 88598 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:42,265 INFO L93 Difference]: Finished difference Result 130379 states and 438439 transitions. [2021-06-05 05:49:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-06-05 05:49:42,265 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:49:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:42,750 INFO L225 Difference]: With dead ends: 130379 [2021-06-05 05:49:42,750 INFO L226 Difference]: Without dead ends: 129369 [2021-06-05 05:49:42,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31329 ImplicationChecksByTransitivity, 11856.3ms TimeCoverageRelationStatistics Valid=7681, Invalid=69325, Unknown=0, NotChecked=0, Total=77006 [2021-06-05 05:49:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129369 states. [2021-06-05 05:49:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129369 to 27396. [2021-06-05 05:49:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27396 states, 27395 states have (on average 3.301770396057675) internal successors, (90452), 27395 states have internal predecessors, (90452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27396 states to 27396 states and 90452 transitions. [2021-06-05 05:49:44,009 INFO L78 Accepts]: Start accepts. Automaton has 27396 states and 90452 transitions. Word has length 54 [2021-06-05 05:49:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:44,009 INFO L482 AbstractCegarLoop]: Abstraction has 27396 states and 90452 transitions. [2021-06-05 05:49:44,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27396 states and 90452 transitions. [2021-06-05 05:49:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:49:44,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:44,049 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:44,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:44,251 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash -757192301, now seen corresponding path program 57 times [2021-06-05 05:49:44,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:44,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387543012] [2021-06-05 05:49:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:49:44,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:44,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387543012] [2021-06-05 05:49:44,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387543012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:44,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385266950] [2021-06-05 05:49:44,641 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 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 [2021-06-05 05:49:44,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:49:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:45,388 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:49:45,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 05:49:45,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:45,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:45,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:45,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 05:49:45,555 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:49:45,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:45,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:45,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:45,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:45,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:49:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385266950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:45,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:45,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 05:49:45,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860150133] [2021-06-05 05:49:45,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:49:45,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:49:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:49:45,638 INFO L87 Difference]: Start difference. First operand 27396 states and 90452 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:58,938 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 05:50:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:03,160 INFO L93 Difference]: Finished difference Result 144390 states and 485662 transitions. [2021-06-05 05:50:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-06-05 05:50:03,160 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:50:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:03,504 INFO L225 Difference]: With dead ends: 144390 [2021-06-05 05:50:03,504 INFO L226 Difference]: Without dead ends: 142820 [2021-06-05 05:50:03,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 14208.6ms TimeCoverageRelationStatistics Valid=9725, Invalid=90447, Unknown=0, NotChecked=0, Total=100172 [2021-06-05 05:50:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142820 states. [2021-06-05 05:50:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142820 to 27718. [2021-06-05 05:50:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27718 states, 27717 states have (on average 3.300285023631706) internal successors, (91474), 27717 states have internal predecessors, (91474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27718 states to 27718 states and 91474 transitions. [2021-06-05 05:50:05,310 INFO L78 Accepts]: Start accepts. Automaton has 27718 states and 91474 transitions. Word has length 54 [2021-06-05 05:50:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:05,310 INFO L482 AbstractCegarLoop]: Abstraction has 27718 states and 91474 transitions. [2021-06-05 05:50:05,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 27718 states and 91474 transitions. [2021-06-05 05:50:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:50:05,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:05,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:05,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:05,600 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash -450654615, now seen corresponding path program 58 times [2021-06-05 05:50:05,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:05,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580553292] [2021-06-05 05:50:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:50:05,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:05,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580553292] [2021-06-05 05:50:05,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580553292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:05,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554349601] [2021-06-05 05:50:05,970 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 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 [2021-06-05 05:50:06,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:06,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:50:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:06,728 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:50:06,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:50:06,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:06,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:06,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:06,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:50:06,866 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:50:06,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:06,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:06,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:06,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:06,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:50:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554349601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:06,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:06,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 05:50:06,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765392298] [2021-06-05 05:50:06,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:50:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:50:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:06,953 INFO L87 Difference]: Start difference. First operand 27718 states and 91474 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:18,462 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 05:50:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:21,592 INFO L93 Difference]: Finished difference Result 126027 states and 422969 transitions. [2021-06-05 05:50:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 05:50:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:50:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:21,871 INFO L225 Difference]: With dead ends: 126027 [2021-06-05 05:50:21,871 INFO L226 Difference]: Without dead ends: 125012 [2021-06-05 05:50:21,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29154 ImplicationChecksByTransitivity, 10875.7ms TimeCoverageRelationStatistics Valid=7000, Invalid=65092, Unknown=0, NotChecked=0, Total=72092 [2021-06-05 05:50:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125012 states. [2021-06-05 05:50:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125012 to 27184. [2021-06-05 05:50:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27184 states, 27183 states have (on average 3.2973181768016775) internal successors, (89631), 27183 states have internal predecessors, (89631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27184 states to 27184 states and 89631 transitions. [2021-06-05 05:50:23,267 INFO L78 Accepts]: Start accepts. Automaton has 27184 states and 89631 transitions. Word has length 54 [2021-06-05 05:50:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:23,267 INFO L482 AbstractCegarLoop]: Abstraction has 27184 states and 89631 transitions. [2021-06-05 05:50:23,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27184 states and 89631 transitions. [2021-06-05 05:50:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:50:23,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:23,306 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:23,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:50:23,506 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:23,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1368733625, now seen corresponding path program 59 times [2021-06-05 05:50:23,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:23,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055730476] [2021-06-05 05:50:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:50:23,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055730476] [2021-06-05 05:50:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055730476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97210795] [2021-06-05 05:50:23,870 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 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 [2021-06-05 05:50:23,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:50:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:50:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:24,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:24,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:24,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:24,729 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 31 [2021-06-05 05:50:24,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:24,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-06-05 05:50:24,871 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:50:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:24,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:24,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:50:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:24,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97210795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:24,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:24,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 05:50:24,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245457120] [2021-06-05 05:50:24,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:50:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:50:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:24,953 INFO L87 Difference]: Start difference. First operand 27184 states and 89631 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:42,496 INFO L93 Difference]: Finished difference Result 132631 states and 444905 transitions. [2021-06-05 05:50:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-06-05 05:50:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:50:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:42,816 INFO L225 Difference]: With dead ends: 132631 [2021-06-05 05:50:42,816 INFO L226 Difference]: Without dead ends: 131761 [2021-06-05 05:50:42,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39131 ImplicationChecksByTransitivity, 13575.7ms TimeCoverageRelationStatistics Valid=9142, Invalid=84188, Unknown=0, NotChecked=0, Total=93330 [2021-06-05 05:50:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131761 states. [2021-06-05 05:50:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131761 to 26238. [2021-06-05 05:50:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26238 states, 26237 states have (on average 3.297976140564851) internal successors, (86529), 26237 states have internal predecessors, (86529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26238 states to 26238 states and 86529 transitions. [2021-06-05 05:50:44,194 INFO L78 Accepts]: Start accepts. Automaton has 26238 states and 86529 transitions. Word has length 54 [2021-06-05 05:50:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:44,194 INFO L482 AbstractCegarLoop]: Abstraction has 26238 states and 86529 transitions. [2021-06-05 05:50:44,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 26238 states and 86529 transitions. [2021-06-05 05:50:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:50:44,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:44,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:44,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:44,436 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash -702299817, now seen corresponding path program 60 times [2021-06-05 05:50:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:44,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487586227] [2021-06-05 05:50:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:44,729 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 05:50:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:50:45,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:45,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487586227] [2021-06-05 05:50:45,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487586227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:45,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297521134] [2021-06-05 05:50:45,071 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 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 [2021-06-05 05:50:45,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:50:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:50:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:45,752 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:50:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:50:45,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:45,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:45,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:45,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 05:50:45,876 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:50:45,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:45,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:45,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:45,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:45,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:50:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:46,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297521134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:46,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:46,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 05:50:46,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047811675] [2021-06-05 05:50:46,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:50:46,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:46,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:50:46,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:46,034 INFO L87 Difference]: Start difference. First operand 26238 states and 86529 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:59,413 INFO L93 Difference]: Finished difference Result 108205 states and 362412 transitions. [2021-06-05 05:50:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-06-05 05:50:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:50:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:59,651 INFO L225 Difference]: With dead ends: 108205 [2021-06-05 05:50:59,651 INFO L226 Difference]: Without dead ends: 106791 [2021-06-05 05:50:59,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26754 ImplicationChecksByTransitivity, 10762.4ms TimeCoverageRelationStatistics Valid=6587, Invalid=60235, Unknown=0, NotChecked=0, Total=66822 [2021-06-05 05:50:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106791 states. [2021-06-05 05:51:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106791 to 23572. [2021-06-05 05:51:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23572 states, 23571 states have (on average 3.3202240040728013) internal successors, (78261), 23571 states have internal predecessors, (78261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23572 states to 23572 states and 78261 transitions. [2021-06-05 05:51:00,522 INFO L78 Accepts]: Start accepts. Automaton has 23572 states and 78261 transitions. Word has length 54 [2021-06-05 05:51:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:00,522 INFO L482 AbstractCegarLoop]: Abstraction has 23572 states and 78261 transitions. [2021-06-05 05:51:00,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23572 states and 78261 transitions. [2021-06-05 05:51:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:00,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:00,552 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:00,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:00,757 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1274429673, now seen corresponding path program 61 times [2021-06-05 05:51:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:00,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868142938] [2021-06-05 05:51:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:01,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:01,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868142938] [2021-06-05 05:51:01,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868142938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:01,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778479308] [2021-06-05 05:51:01,469 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 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 [2021-06-05 05:51:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:51:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:02,116 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-06-05 05:51:02,214 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:02,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:51:02,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:02,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:02,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:02,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:51:02,388 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:02,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:02,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:02,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:02,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:02,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:51:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:02,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778479308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:02,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:02,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:51:02,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972930118] [2021-06-05 05:51:02,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:51:02,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:02,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:51:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:51:02,487 INFO L87 Difference]: Start difference. First operand 23572 states and 78261 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:15,178 INFO L93 Difference]: Finished difference Result 101893 states and 342921 transitions. [2021-06-05 05:51:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 05:51:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:51:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:15,416 INFO L225 Difference]: With dead ends: 101893 [2021-06-05 05:51:15,416 INFO L226 Difference]: Without dead ends: 101033 [2021-06-05 05:51:15,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23364 ImplicationChecksByTransitivity, 9667.7ms TimeCoverageRelationStatistics Valid=5536, Invalid=54734, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 05:51:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101033 states. [2021-06-05 05:51:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101033 to 23904. [2021-06-05 05:51:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23903 states have (on average 3.316487470192026) internal successors, (79274), 23903 states have internal predecessors, (79274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 79274 transitions. [2021-06-05 05:51:16,457 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 79274 transitions. Word has length 54 [2021-06-05 05:51:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:16,458 INFO L482 AbstractCegarLoop]: Abstraction has 23904 states and 79274 transitions. [2021-06-05 05:51:16,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 79274 transitions. [2021-06-05 05:51:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:16,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:16,490 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:16,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:16,690 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1901672493, now seen corresponding path program 62 times [2021-06-05 05:51:16,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:16,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660833652] [2021-06-05 05:51:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:17,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:17,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660833652] [2021-06-05 05:51:17,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660833652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:17,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509627328] [2021-06-05 05:51:17,348 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 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 [2021-06-05 05:51:17,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:17,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:51:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:17,990 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:17,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:51:17,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:18,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:51:18,133 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:18,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:18,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:18,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:51:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:18,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509627328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:18,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:18,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:51:18,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375488816] [2021-06-05 05:51:18,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:51:18,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:18,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:51:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:51:18,216 INFO L87 Difference]: Start difference. First operand 23904 states and 79274 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:30,371 INFO L93 Difference]: Finished difference Result 91780 states and 309030 transitions. [2021-06-05 05:51:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 05:51:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:51:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:30,559 INFO L225 Difference]: With dead ends: 91780 [2021-06-05 05:51:30,559 INFO L226 Difference]: Without dead ends: 90930 [2021-06-05 05:51:30,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22028 ImplicationChecksByTransitivity, 10247.9ms TimeCoverageRelationStatistics Valid=5784, Invalid=51576, Unknown=0, NotChecked=0, Total=57360 [2021-06-05 05:51:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90930 states. [2021-06-05 05:51:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90930 to 23990. [2021-06-05 05:51:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23990 states, 23989 states have (on average 3.311601150527325) internal successors, (79442), 23989 states have internal predecessors, (79442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 79442 transitions. [2021-06-05 05:51:31,417 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 79442 transitions. Word has length 54 [2021-06-05 05:51:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:31,417 INFO L482 AbstractCegarLoop]: Abstraction has 23990 states and 79442 transitions. [2021-06-05 05:51:31,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 79442 transitions. [2021-06-05 05:51:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:31,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:31,548 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:31,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:51:31,749 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1703119415, now seen corresponding path program 63 times [2021-06-05 05:51:31,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:31,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158613919] [2021-06-05 05:51:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 05:51:32,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:32,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158613919] [2021-06-05 05:51:32,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158613919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:32,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045555875] [2021-06-05 05:51:32,164 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 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 [2021-06-05 05:51:32,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:51:32,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:32,841 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:32,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:51:32,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:32,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 05:51:32,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:32,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:32,958 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 18 [2021-06-05 05:51:32,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:32,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 05:51:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045555875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:33,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:33,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 05:51:33,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043485841] [2021-06-05 05:51:33,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:51:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:51:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:51:33,048 INFO L87 Difference]: Start difference. First operand 23990 states and 79442 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:47,145 INFO L93 Difference]: Finished difference Result 83749 states and 282555 transitions. [2021-06-05 05:51:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-06-05 05:51:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:51:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:47,309 INFO L225 Difference]: With dead ends: 83749 [2021-06-05 05:51:47,310 INFO L226 Difference]: Without dead ends: 79687 [2021-06-05 05:51:47,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22824 ImplicationChecksByTransitivity, 11168.5ms TimeCoverageRelationStatistics Valid=5842, Invalid=52480, Unknown=0, NotChecked=0, Total=58322 [2021-06-05 05:51:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79687 states. [2021-06-05 05:51:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79687 to 24522. [2021-06-05 05:51:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24522 states, 24521 states have (on average 3.308837323110803) internal successors, (81136), 24521 states have internal predecessors, (81136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24522 states to 24522 states and 81136 transitions. [2021-06-05 05:51:48,050 INFO L78 Accepts]: Start accepts. Automaton has 24522 states and 81136 transitions. Word has length 54 [2021-06-05 05:51:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:48,050 INFO L482 AbstractCegarLoop]: Abstraction has 24522 states and 81136 transitions. [2021-06-05 05:51:48,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24522 states and 81136 transitions. [2021-06-05 05:51:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:48,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:48,083 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:48,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:48,283 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1112434429, now seen corresponding path program 64 times [2021-06-05 05:51:48,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:48,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669225275] [2021-06-05 05:51:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:51:48,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669225275] [2021-06-05 05:51:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669225275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042013809] [2021-06-05 05:51:48,799 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 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 [2021-06-05 05:51:48,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:48,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:51:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:49,404 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:51:49,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:49,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:49,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:49,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 05:51:49,576 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:51:49,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:49,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:49,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:49,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:49,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:51:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:49,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042013809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:49,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:49,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:51:49,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973135308] [2021-06-05 05:51:49,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:51:49,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:51:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:51:49,659 INFO L87 Difference]: Start difference. First operand 24522 states and 81136 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:52,452 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 05:52:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:02,034 INFO L93 Difference]: Finished difference Result 94684 states and 318256 transitions. [2021-06-05 05:52:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 05:52:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:02,219 INFO L225 Difference]: With dead ends: 94684 [2021-06-05 05:52:02,219 INFO L226 Difference]: Without dead ends: 93786 [2021-06-05 05:52:02,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22145 ImplicationChecksByTransitivity, 9444.9ms TimeCoverageRelationStatistics Valid=5306, Invalid=51576, Unknown=0, NotChecked=0, Total=56882 [2021-06-05 05:52:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93786 states. [2021-06-05 05:52:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93786 to 25118. [2021-06-05 05:52:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25118 states, 25117 states have (on average 3.3056495600589244) internal successors, (83028), 25117 states have internal predecessors, (83028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25118 states to 25118 states and 83028 transitions. [2021-06-05 05:52:03,080 INFO L78 Accepts]: Start accepts. Automaton has 25118 states and 83028 transitions. Word has length 54 [2021-06-05 05:52:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:03,080 INFO L482 AbstractCegarLoop]: Abstraction has 25118 states and 83028 transitions. [2021-06-05 05:52:03,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25118 states and 83028 transitions. [2021-06-05 05:52:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:03,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:03,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:03,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:03,317 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 605110623, now seen corresponding path program 65 times [2021-06-05 05:52:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:03,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782104233] [2021-06-05 05:52:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:52:03,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:03,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782104233] [2021-06-05 05:52:03,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782104233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:03,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331266222] [2021-06-05 05:52:03,688 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 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 [2021-06-05 05:52:03,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:52:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:52:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:04,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:04,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,323 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 29 [2021-06-05 05:52:04,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:04,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:31 [2021-06-05 05:52:04,497 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:52:04,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:04,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:04,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:52:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331266222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:04,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:04,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:52:04,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536379705] [2021-06-05 05:52:04,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:52:04,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:52:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:52:04,579 INFO L87 Difference]: Start difference. First operand 25118 states and 83028 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:05,247 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-06-05 05:52:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:19,065 INFO L93 Difference]: Finished difference Result 115635 states and 388960 transitions. [2021-06-05 05:52:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-06-05 05:52:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:19,561 INFO L225 Difference]: With dead ends: 115635 [2021-06-05 05:52:19,561 INFO L226 Difference]: Without dead ends: 114631 [2021-06-05 05:52:19,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29308 ImplicationChecksByTransitivity, 11717.3ms TimeCoverageRelationStatistics Valid=7087, Invalid=66083, Unknown=0, NotChecked=0, Total=73170 [2021-06-05 05:52:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114631 states. [2021-06-05 05:52:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114631 to 25490. [2021-06-05 05:52:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25490 states, 25489 states have (on average 3.3076621287614265) internal successors, (84309), 25489 states have internal predecessors, (84309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25490 states to 25490 states and 84309 transitions. [2021-06-05 05:52:20,425 INFO L78 Accepts]: Start accepts. Automaton has 25490 states and 84309 transitions. Word has length 54 [2021-06-05 05:52:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:20,425 INFO L482 AbstractCegarLoop]: Abstraction has 25490 states and 84309 transitions. [2021-06-05 05:52:20,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 25490 states and 84309 transitions. [2021-06-05 05:52:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:20,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:20,456 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:20,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 05:52:20,657 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -312968387, now seen corresponding path program 66 times [2021-06-05 05:52:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:20,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640488301] [2021-06-05 05:52:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:52:21,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:21,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640488301] [2021-06-05 05:52:21,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640488301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:21,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961046983] [2021-06-05 05:52:21,119 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 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 [2021-06-05 05:52:21,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:52:21,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:52:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:22,091 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:52:22,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 05:52:22,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:22,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:22,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:22,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 05:52:22,263 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:52:22,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:22,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:22,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:22,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:22,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:52:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:22,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961046983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:22,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:22,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:52:22,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807746140] [2021-06-05 05:52:22,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:52:22,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:52:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:52:22,344 INFO L87 Difference]: Start difference. First operand 25490 states and 84309 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,179 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-06-05 05:52:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:39,809 INFO L93 Difference]: Finished difference Result 126947 states and 426952 transitions. [2021-06-05 05:52:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2021-06-05 05:52:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:40,104 INFO L225 Difference]: With dead ends: 126947 [2021-06-05 05:52:40,105 INFO L226 Difference]: Without dead ends: 125608 [2021-06-05 05:52:40,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39699 ImplicationChecksByTransitivity, 14435.4ms TimeCoverageRelationStatistics Valid=8842, Invalid=86948, Unknown=0, NotChecked=0, Total=95790 [2021-06-05 05:52:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125608 states. [2021-06-05 05:52:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125608 to 25380. [2021-06-05 05:52:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 3.307064896174002) internal successors, (83930), 25379 states have internal predecessors, (83930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 83930 transitions. [2021-06-05 05:52:41,419 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 83930 transitions. Word has length 54 [2021-06-05 05:52:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:41,419 INFO L482 AbstractCegarLoop]: Abstraction has 25380 states and 83930 transitions. [2021-06-05 05:52:41,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 83930 transitions. [2021-06-05 05:52:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:41,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:41,455 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:41,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:41,656 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash -6430701, now seen corresponding path program 67 times [2021-06-05 05:52:41,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:41,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764843875] [2021-06-05 05:52:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:52:42,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:42,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764843875] [2021-06-05 05:52:42,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764843875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:42,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695181286] [2021-06-05 05:52:42,086 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 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 [2021-06-05 05:52:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:52:42,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:42,940 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:52:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:52:42,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:42,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:42,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:42,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:52:43,074 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:52:43,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:43,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:43,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:52:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:43,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695181286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:43,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:43,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:52:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678986581] [2021-06-05 05:52:43,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:52:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:52:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:52:43,157 INFO L87 Difference]: Start difference. First operand 25380 states and 83930 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:57,726 INFO L93 Difference]: Finished difference Result 116033 states and 390273 transitions. [2021-06-05 05:52:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-06-05 05:52:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:57,982 INFO L225 Difference]: With dead ends: 116033 [2021-06-05 05:52:57,982 INFO L226 Difference]: Without dead ends: 115155 [2021-06-05 05:52:57,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27626 ImplicationChecksByTransitivity, 11042.9ms TimeCoverageRelationStatistics Valid=6490, Invalid=62942, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 05:52:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115155 states. [2021-06-05 05:52:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115155 to 25374. [2021-06-05 05:52:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25374 states, 25373 states have (on average 3.307019272454972) internal successors, (83909), 25373 states have internal predecessors, (83909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25374 states to 25374 states and 83909 transitions. [2021-06-05 05:52:59,408 INFO L78 Accepts]: Start accepts. Automaton has 25374 states and 83909 transitions. Word has length 54 [2021-06-05 05:52:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:59,408 INFO L482 AbstractCegarLoop]: Abstraction has 25374 states and 83909 transitions. [2021-06-05 05:52:59,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 25374 states and 83909 transitions. [2021-06-05 05:52:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:59,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:59,446 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:59,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:59,648 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:59,648 INFO L82 PathProgramCache]: Analyzing trace with hash -924509711, now seen corresponding path program 68 times [2021-06-05 05:52:59,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:59,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988949115] [2021-06-05 05:52:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:53:00,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988949115] [2021-06-05 05:53:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988949115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454631730] [2021-06-05 05:53:00,026 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 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 [2021-06-05 05:53:00,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:53:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:00,661 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:00,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:53:00,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 05:53:00,796 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:00,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:53:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:00,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454631730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:00,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:00,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:53:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322845039] [2021-06-05 05:53:00,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:53:00,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:53:00,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:53:00,999 INFO L87 Difference]: Start difference. First operand 25374 states and 83909 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:17,733 INFO L93 Difference]: Finished difference Result 120682 states and 405497 transitions. [2021-06-05 05:53:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-06-05 05:53:17,734 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:18,027 INFO L225 Difference]: With dead ends: 120682 [2021-06-05 05:53:18,027 INFO L226 Difference]: Without dead ends: 119807 [2021-06-05 05:53:18,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37756 ImplicationChecksByTransitivity, 13648.8ms TimeCoverageRelationStatistics Valid=8417, Invalid=83089, Unknown=0, NotChecked=0, Total=91506 [2021-06-05 05:53:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119807 states. [2021-06-05 05:53:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119807 to 25158. [2021-06-05 05:53:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25158 states, 25157 states have (on average 3.305879079381484) internal successors, (83166), 25157 states have internal predecessors, (83166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25158 states to 25158 states and 83166 transitions. [2021-06-05 05:53:19,515 INFO L78 Accepts]: Start accepts. Automaton has 25158 states and 83166 transitions. Word has length 54 [2021-06-05 05:53:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:19,515 INFO L482 AbstractCegarLoop]: Abstraction has 25158 states and 83166 transitions. [2021-06-05 05:53:19,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 25158 states and 83166 transitions. [2021-06-05 05:53:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:19,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:19,553 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:19,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:19,753 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:19,754 INFO L82 PathProgramCache]: Analyzing trace with hash -258075903, now seen corresponding path program 69 times [2021-06-05 05:53:19,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:19,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161165688] [2021-06-05 05:53:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:53:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161165688] [2021-06-05 05:53:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161165688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913508227] [2021-06-05 05:53:20,216 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 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 [2021-06-05 05:53:20,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:53:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:20,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:21,001 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:21,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:53:21,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:21,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 05:53:21,095 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:21,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:21,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:21,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:53:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913508227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:21,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:21,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:53:21,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744834153] [2021-06-05 05:53:21,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:53:21,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:21,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:53:21,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:53:21,177 INFO L87 Difference]: Start difference. First operand 25158 states and 83166 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:34,955 INFO L93 Difference]: Finished difference Result 95640 states and 320302 transitions. [2021-06-05 05:53:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-06-05 05:53:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:35,151 INFO L225 Difference]: With dead ends: 95640 [2021-06-05 05:53:35,152 INFO L226 Difference]: Without dead ends: 94430 [2021-06-05 05:53:35,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26277 ImplicationChecksByTransitivity, 10861.5ms TimeCoverageRelationStatistics Valid=6263, Invalid=60043, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 05:53:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94430 states. [2021-06-05 05:53:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94430 to 25134. [2021-06-05 05:53:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25134 states, 25133 states have (on average 3.3059324394222735) internal successors, (83088), 25133 states have internal predecessors, (83088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25134 states to 25134 states and 83088 transitions. [2021-06-05 05:53:36,399 INFO L78 Accepts]: Start accepts. Automaton has 25134 states and 83088 transitions. Word has length 54 [2021-06-05 05:53:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:36,399 INFO L482 AbstractCegarLoop]: Abstraction has 25134 states and 83088 transitions. [2021-06-05 05:53:36,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 25134 states and 83088 transitions. [2021-06-05 05:53:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:36,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:36,431 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:36,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 05:53:36,631 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1981468115, now seen corresponding path program 70 times [2021-06-05 05:53:36,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:36,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457951669] [2021-06-05 05:53:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:53:37,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:37,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457951669] [2021-06-05 05:53:37,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457951669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756107786] [2021-06-05 05:53:37,017 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 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 [2021-06-05 05:53:37,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:37,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:37,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:53:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:37,724 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:37,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:53:37,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 05:53:37,816 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:37,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:37,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:53:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756107786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:37,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 05:53:37,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091194201] [2021-06-05 05:53:37,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:53:37,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:53:37,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:53:37,897 INFO L87 Difference]: Start difference. First operand 25134 states and 83088 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:49,470 INFO L93 Difference]: Finished difference Result 86306 states and 290216 transitions. [2021-06-05 05:53:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-06-05 05:53:49,470 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:49,634 INFO L225 Difference]: With dead ends: 86306 [2021-06-05 05:53:49,635 INFO L226 Difference]: Without dead ends: 82314 [2021-06-05 05:53:49,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19453 ImplicationChecksByTransitivity, 9099.4ms TimeCoverageRelationStatistics Valid=5086, Invalid=44866, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 05:53:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82314 states. [2021-06-05 05:53:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82314 to 25752. [2021-06-05 05:53:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25752 states, 25751 states have (on average 3.303522193312881) internal successors, (85069), 25751 states have internal predecessors, (85069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25752 states to 25752 states and 85069 transitions. [2021-06-05 05:53:50,390 INFO L78 Accepts]: Start accepts. Automaton has 25752 states and 85069 transitions. Word has length 54 [2021-06-05 05:53:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:50,390 INFO L482 AbstractCegarLoop]: Abstraction has 25752 states and 85069 transitions. [2021-06-05 05:53:50,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 25752 states and 85069 transitions. [2021-06-05 05:53:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:50,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:50,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:50,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 05:53:50,875 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1676107171, now seen corresponding path program 71 times [2021-06-05 05:53:50,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:50,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238317783] [2021-06-05 05:53:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:53:51,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238317783] [2021-06-05 05:53:51,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238317783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510281816] [2021-06-05 05:53:51,292 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 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 [2021-06-05 05:53:51,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:51,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:53:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:51,977 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:51,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 05:53:51,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 05:53:52,071 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:53:52,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:52,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:52,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:52,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:52,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 05:53:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510281816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:52,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 05:53:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460837988] [2021-06-05 05:53:52,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:53:52,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:52,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:53:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:53:52,314 INFO L87 Difference]: Start difference. First operand 25752 states and 85069 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:53:52,613 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-05 05:53:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:53:52,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:53:52,814 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:53:52,816 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:53:52,817 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:53:52,817 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:53:52 BasicIcfg [2021-06-05 05:53:52,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:53:52,818 INFO L168 Benchmark]: Toolchain (without parser) took 724582.34 ms. Allocated memory was 354.4 MB in the beginning and 8.4 GB in the end (delta: 8.1 GB). Free memory was 333.9 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. [2021-06-05 05:53:52,818 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 354.4 MB. Free memory is still 335.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:53:52,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.14 ms. Allocated memory is still 354.4 MB. Free memory was 333.8 MB in the beginning and 332.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:53:52,818 INFO L168 Benchmark]: Boogie Preprocessor took 14.11 ms. Allocated memory is still 354.4 MB. Free memory was 332.3 MB in the beginning and 331.4 MB in the end (delta: 940.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:53:52,818 INFO L168 Benchmark]: RCFGBuilder took 246.33 ms. Allocated memory is still 354.4 MB. Free memory was 331.2 MB in the beginning and 316.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 05:53:52,818 INFO L168 Benchmark]: TraceAbstraction took 724289.46 ms. Allocated memory was 354.4 MB in the beginning and 8.4 GB in the end (delta: 8.1 GB). Free memory was 315.6 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. [2021-06-05 05:53:52,818 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 0.16 ms. Allocated memory is still 354.4 MB. Free memory is still 335.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.14 ms. Allocated memory is still 354.4 MB. Free memory was 333.8 MB in the beginning and 332.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.11 ms. Allocated memory is still 354.4 MB. Free memory was 332.3 MB in the beginning and 331.4 MB in the end (delta: 940.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 246.33 ms. Allocated memory is still 354.4 MB. Free memory was 331.2 MB in the beginning and 316.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 724289.46 ms. Allocated memory was 354.4 MB in the beginning and 8.4 GB in the end (delta: 8.1 GB). Free memory was 315.6 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (25752states) and FLOYD_HOARE automaton (currently 9 states, 46 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 13ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (25752states) and FLOYD_HOARE automaton (currently 9 states, 46 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 13ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (25752states) and FLOYD_HOARE automaton (currently 9 states, 46 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 13ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (25752states) and FLOYD_HOARE automaton (currently 9 states, 46 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 13ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (25752states) and FLOYD_HOARE automaton (currently 9 states, 46 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 724159.5ms, OverallIterations: 75, TraceHistogramMax: 3, EmptinessCheckTime: 1794.2ms, AutomataDifference: 583268.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7311 SDtfs, 85984 SDslu, 138948 SDs, 0 SdLazy, 289326 SolverSat, 25682 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 125386.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14837 GetRequests, 2339 SyntacticMatches, 146 SemanticMatches, 12351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041644 ImplicationChecksByTransitivity, 450960.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27718occurred in iteration=61, InterpolantAutomatonStates: 10086, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45340.9ms AutomataMinimizationTime, 74 MinimizatonAttempts, 3473731 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 452.5ms SsaConstructionTime, 2086.7ms SatisfiabilityAnalysisTime, 74488.0ms InterpolantComputationTime, 7006 NumberOfCodeBlocks, 7006 NumberOfCodeBlocksAsserted, 279 NumberOfCheckSat, 6860 ConstructedInterpolants, 48 QuantifiedInterpolants, 104721 SizeOfPredicates, 745 NumberOfNonLiveVariables, 9432 ConjunctsInSsa, 2441 ConjunctsInUnsatCore, 146 InterpolantComputations, 6 PerfectInterpolantSequences, 983/3815 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