/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/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:13:13,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:13:13,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:13:13,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:13:13,327 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 23:13:13,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:13:13,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:13:13,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:13:13,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:13:13,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:13:13,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:13:13,356 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:13:13,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:13:13,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:13:13,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:13:13,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:13:13,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:13:13,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:13:13,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:13:13,359 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:13:13,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:13:13,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:13:13,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:13:13,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:13:13,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:13:13,625 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:13:13,629 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:13:13,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2021-06-05 23:13:13,630 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2021-06-05 23:13:13,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:13:13,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:13:13,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:13:13,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:13:13,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:13:13,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:13:13,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:13:13,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:13:13,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:13:13,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/1) ... [2021-06-05 23:13:13,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:13:13,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:13:13,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:13:13,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:13:13,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (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 23:13:13,752 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:13:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:13:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:13:13,753 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:13:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:13:13,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:13:13,753 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:13:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:13:13,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:13:13,754 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:13:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:13:13,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:13:13,755 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 23:13:13,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:13:13,891 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:13:13,892 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:13:13 BoogieIcfgContainer [2021-06-05 23:13:13,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:13:13,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:13:13,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:13:13,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:13:13,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:13:13" (1/2) ... [2021-06-05 23:13:13,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b062ee9 and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:13:13, skipping insertion in model container [2021-06-05 23:13:13,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:13:13" (2/2) ... [2021-06-05 23:13:13,897 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2021-06-05 23:13:13,901 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:13:13,901 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:13:13,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:13:13,902 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:13:13,955 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:13:13,968 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:13:13,981 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:13:13,981 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:13:13,981 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:13:13,981 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:13:13,981 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:13:13,981 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:13:13,981 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:13:13,981 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:13:13,993 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-06-05 23:13:14,017 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 23:13:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 23:13:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:13:14,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:14,030 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:14,031 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash -514212460, now seen corresponding path program 1 times [2021-06-05 23:13:14,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:14,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860542535] [2021-06-05 23:13:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:14,348 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 23:13:14,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:14,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860542535] [2021-06-05 23:13:14,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860542535] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:13:14,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:13:14,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:13:14,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262170430] [2021-06-05 23:13:14,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:13:14,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:13:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:13:14,367 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 23:13:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:14,478 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-06-05 23:13:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:13:14,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:13:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:14,487 INFO L225 Difference]: With dead ends: 257 [2021-06-05 23:13:14,487 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 23:13:14,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:13:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 23:13:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-06-05 23:13:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 23:13:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-06-05 23:13:14,524 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-06-05 23:13:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:14,524 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-06-05 23:13:14,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 23:13:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-06-05 23:13:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:13:14,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:14,526 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:14,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:13:14,527 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:14,527 INFO L82 PathProgramCache]: Analyzing trace with hash -610054924, now seen corresponding path program 1 times [2021-06-05 23:13:14,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:14,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835041760] [2021-06-05 23:13:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:14,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835041760] [2021-06-05 23:13:14,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835041760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716183053] [2021-06-05 23:13:14,556 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 23:13:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:13:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:14,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716183053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:14,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:14,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 23:13:14,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962963087] [2021-06-05 23:13:14,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:13:14,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:14,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:13:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:13:14,710 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 23:13:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:14,782 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2021-06-05 23:13:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:13:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 18 [2021-06-05 23:13:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:14,785 INFO L225 Difference]: With dead ends: 376 [2021-06-05 23:13:14,785 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 23:13:14,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:13:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 23:13:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2021-06-05 23:13:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 23:13:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2021-06-05 23:13:14,800 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2021-06-05 23:13:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:14,800 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2021-06-05 23:13:14,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 23:13:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2021-06-05 23:13:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:13:14,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:14,802 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:15,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 23:13:15,017 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash 814452718, now seen corresponding path program 2 times [2021-06-05 23:13:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:15,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601384466] [2021-06-05 23:13:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:15,038 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 23:13:15,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:15,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601384466] [2021-06-05 23:13:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601384466] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:13:15,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:13:15,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:13:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3884971] [2021-06-05 23:13:15,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:13:15,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:13:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:13:15,040 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:15,075 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2021-06-05 23:13:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:13:15,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:13:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:15,077 INFO L225 Difference]: With dead ends: 221 [2021-06-05 23:13:15,077 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 23:13:15,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:13:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 23:13:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2021-06-05 23:13:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 23:13:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2021-06-05 23:13:15,094 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2021-06-05 23:13:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:15,094 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2021-06-05 23:13:15,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2021-06-05 23:13:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:13:15,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:15,096 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:15,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:13:15,096 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash 507661300, now seen corresponding path program 1 times [2021-06-05 23:13:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:15,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084576976] [2021-06-05 23:13:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:15,151 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 23:13:15,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:15,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084576976] [2021-06-05 23:13:15,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084576976] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:13:15,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:13:15,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:13:15,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041832529] [2021-06-05 23:13:15,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:13:15,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:15,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:13:15,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:13:15,152 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 23:13:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:15,165 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2021-06-05 23:13:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:13:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:13:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:15,167 INFO L225 Difference]: With dead ends: 239 [2021-06-05 23:13:15,167 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 23:13:15,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:13:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 23:13:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-06-05 23:13:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 23:13:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-06-05 23:13:15,175 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2021-06-05 23:13:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:15,176 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-06-05 23:13:15,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 23:13:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-06-05 23:13:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:13:15,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:15,177 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:15,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:13:15,177 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1163798226, now seen corresponding path program 1 times [2021-06-05 23:13:15,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:15,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893225350] [2021-06-05 23:13:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:15,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893225350] [2021-06-05 23:13:15,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893225350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510617595] [2021-06-05 23:13:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:13:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:13:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:15,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510617595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:15,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:15,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 23:13:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605373111] [2021-06-05 23:13:15,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:13:15,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:13:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:13:15,328 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 23:13:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:15,373 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-06-05 23:13:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:13:15,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 21 [2021-06-05 23:13:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:15,375 INFO L225 Difference]: With dead ends: 280 [2021-06-05 23:13:15,375 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 23:13:15,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:13:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 23:13:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-06-05 23:13:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 23:13:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-05 23:13:15,391 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-06-05 23:13:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:15,391 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-05 23:13:15,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 23:13:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-05 23:13:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:13:15,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:15,397 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:15,617 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1608131998, now seen corresponding path program 1 times [2021-06-05 23:13:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64446759] [2021-06-05 23:13:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:15,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64446759] [2021-06-05 23:13:15,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64446759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533300314] [2021-06-05 23:13:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:13:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:13:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:15,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 23:13:15,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 23:13:15,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:15,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 23:13:15,975 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 13 treesize of output 9 [2021-06-05 23:13:15,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:15,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 23:13:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:16,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533300314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:16,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:16,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:13:16,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907409053] [2021-06-05 23:13:16,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:13:16,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:16,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:13:16,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:13:16,022 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:16,218 INFO L93 Difference]: Finished difference Result 381 states and 1115 transitions. [2021-06-05 23:13:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:13:16,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:13:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:16,220 INFO L225 Difference]: With dead ends: 381 [2021-06-05 23:13:16,220 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 23:13:16,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:13:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 23:13:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 294. [2021-06-05 23:13:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states 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 23:13:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2021-06-05 23:13:16,228 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2021-06-05 23:13:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:16,228 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2021-06-05 23:13:16,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2021-06-05 23:13:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:13:16,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:16,229 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:16,437 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash -108579982, now seen corresponding path program 2 times [2021-06-05 23:13:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:16,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498717474] [2021-06-05 23:13:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:16,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:16,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498717474] [2021-06-05 23:13:16,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498717474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:16,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746782870] [2021-06-05 23:13:16,554 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 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 23:13:16,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:13:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:16,649 INFO L446 ElimStorePlain]: Different costs {0=[v_C_15], 1=[A]} [2021-06-05 23:13:16,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:16,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:16,663 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 23:13:16,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:16,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2021-06-05 23:13:16,703 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 13 treesize of output 9 [2021-06-05 23:13:16,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:16,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:16,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 23:13:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:16,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746782870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:16,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:16,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:13:16,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227717951] [2021-06-05 23:13:16,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:13:16,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:16,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:13:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:13:16,753 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:16,959 INFO L93 Difference]: Finished difference Result 588 states and 1800 transitions. [2021-06-05 23:13:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:13:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:13:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:16,961 INFO L225 Difference]: With dead ends: 588 [2021-06-05 23:13:16,961 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 23:13:16,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:13:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 23:13:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 314. [2021-06-05 23:13:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states 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 23:13:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-06-05 23:13:16,969 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-06-05 23:13:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:16,969 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-06-05 23:13:16,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-06-05 23:13:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:13:16,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:16,970 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:17,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:17,181 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash 627268620, now seen corresponding path program 3 times [2021-06-05 23:13:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:17,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877039921] [2021-06-05 23:13:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:17,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:17,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877039921] [2021-06-05 23:13:17,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877039921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:17,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658788719] [2021-06-05 23:13:17,280 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 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 23:13:17,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:13:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:13:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:17,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:17,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:17,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:13:17,377 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 17 treesize of output 13 [2021-06-05 23:13:17,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:17,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-05 23:13:17,407 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 13 treesize of output 9 [2021-06-05 23:13:17,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:17,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 23:13:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:17,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658788719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:17,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:17,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:13:17,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114120785] [2021-06-05 23:13:17,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:13:17,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:13:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:13:17,469 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:17,737 INFO L93 Difference]: Finished difference Result 534 states and 1651 transitions. [2021-06-05 23:13:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:13:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:13:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:17,741 INFO L225 Difference]: With dead ends: 534 [2021-06-05 23:13:17,741 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 23:13:17,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:13:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 23:13:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 366. [2021-06-05 23:13:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states 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 23:13:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 23:13:17,750 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 23:13:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:17,750 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 23:13:17,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 23:13:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:13:17,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:17,752 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:17,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:17,968 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash -793182992, now seen corresponding path program 4 times [2021-06-05 23:13:17,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:17,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768574577] [2021-06-05 23:13:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:18,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:18,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768574577] [2021-06-05 23:13:18,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768574577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:18,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631508226] [2021-06-05 23:13:18,062 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 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 23:13:18,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:13:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:18,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:18,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:18,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:18,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:18,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:13:18,183 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:13:18,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:18,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:18,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:18,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:17 [2021-06-05 23:13:18,211 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 13 treesize of output 9 [2021-06-05 23:13:18,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:18,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:18,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:18,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 23:13:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:18,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631508226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:18,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:18,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:13:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594127727] [2021-06-05 23:13:18,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:13:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:13:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:13:18,268 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:18,474 INFO L93 Difference]: Finished difference Result 573 states and 1778 transitions. [2021-06-05 23:13:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:13:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:13:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:18,477 INFO L225 Difference]: With dead ends: 573 [2021-06-05 23:13:18,477 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 23:13:18,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:13:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 23:13:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 366. [2021-06-05 23:13:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states 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 23:13:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 23:13:18,486 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 23:13:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:18,487 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 23:13:18,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 23:13:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:13:18,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:18,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:18,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:18,705 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1481835136, now seen corresponding path program 5 times [2021-06-05 23:13:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:18,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561865372] [2021-06-05 23:13:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:18,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:18,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561865372] [2021-06-05 23:13:18,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561865372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:18,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688956975] [2021-06-05 23:13:18,731 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 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 23:13:18,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:13:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:18,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:18,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688956975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:18,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:18,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 23:13:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483492518] [2021-06-05 23:13:18,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:13:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:13:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:13:18,844 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 23:13:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:18,932 INFO L93 Difference]: Finished difference Result 802 states and 2408 transitions. [2021-06-05 23:13:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:13:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2021-06-05 23:13:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:18,936 INFO L225 Difference]: With dead ends: 802 [2021-06-05 23:13:18,936 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 23:13:18,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:13:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 23:13:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 460. [2021-06-05 23:13:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states 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 23:13:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2021-06-05 23:13:18,947 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2021-06-05 23:13:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:18,948 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2021-06-05 23:13:18,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 23:13:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2021-06-05 23:13:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:13:18,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:18,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:19,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 23:13:19,167 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash 895801792, now seen corresponding path program 6 times [2021-06-05 23:13:19,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:19,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129728830] [2021-06-05 23:13:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:19,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:19,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129728830] [2021-06-05 23:13:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129728830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:19,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770414070] [2021-06-05 23:13:19,195 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:13:19,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:13:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:13:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:19,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770414070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:19,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:19,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:13:19,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217099240] [2021-06-05 23:13:19,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:13:19,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:19,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:13:19,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:13:19,286 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:19,918 INFO L93 Difference]: Finished difference Result 1766 states and 5540 transitions. [2021-06-05 23:13:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:13:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:13:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:19,925 INFO L225 Difference]: With dead ends: 1766 [2021-06-05 23:13:19,926 INFO L226 Difference]: Without dead ends: 1766 [2021-06-05 23:13:19,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=463, Invalid=1793, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:13:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-06-05 23:13:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 908. [2021-06-05 23:13:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.404630650496141) internal successors, (3088), 907 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states 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 23:13:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3088 transitions. [2021-06-05 23:13:19,952 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3088 transitions. Word has length 25 [2021-06-05 23:13:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:19,952 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 3088 transitions. [2021-06-05 23:13:19,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3088 transitions. [2021-06-05 23:13:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:13:19,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:19,954 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:20,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 23:13:20,169 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash -299972656, now seen corresponding path program 7 times [2021-06-05 23:13:20,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:20,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718989500] [2021-06-05 23:13:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:20,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:20,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718989500] [2021-06-05 23:13:20,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718989500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396562633] [2021-06-05 23:13:20,190 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 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 23:13:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396562633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:20,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:13:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187983056] [2021-06-05 23:13:20,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:13:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:13:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:13:20,260 INFO L87 Difference]: Start difference. First operand 908 states and 3088 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 23:13:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:20,332 INFO L93 Difference]: Finished difference Result 1372 states and 4480 transitions. [2021-06-05 23:13:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:13:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-06-05 23:13:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:20,338 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 23:13:20,338 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 23:13:20,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:13:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 23:13:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 907. [2021-06-05 23:13:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.3863134657836644) internal successors, (3068), 906 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states 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 23:13:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3068 transitions. [2021-06-05 23:13:20,360 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3068 transitions. Word has length 25 [2021-06-05 23:13:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:20,360 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3068 transitions. [2021-06-05 23:13:20,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 23:13:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3068 transitions. [2021-06-05 23:13:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:13:20,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:20,362 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:20,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:20,583 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:20,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1819069974, now seen corresponding path program 8 times [2021-06-05 23:13:20,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:20,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584745042] [2021-06-05 23:13:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:20,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:20,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584745042] [2021-06-05 23:13:20,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584745042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079148601] [2021-06-05 23:13:20,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:20,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:20,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079148601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:20,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 23:13:20,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610065239] [2021-06-05 23:13:20,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:13:20,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:13:20,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:13:20,702 INFO L87 Difference]: Start difference. First operand 907 states and 3068 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:21,071 INFO L93 Difference]: Finished difference Result 2708 states and 9315 transitions. [2021-06-05 23:13:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:13:21,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:13:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:21,083 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 23:13:21,083 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 23:13:21,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 23:13:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1405. [2021-06-05 23:13:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.6039886039886038) internal successors, (5060), 1404 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states 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 23:13:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5060 transitions. [2021-06-05 23:13:21,126 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5060 transitions. Word has length 25 [2021-06-05 23:13:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:21,126 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 5060 transitions. [2021-06-05 23:13:21,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5060 transitions. [2021-06-05 23:13:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:13:21,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:21,129 INFO L554 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] [2021-06-05 23:13:21,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:21,345 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1863515072, now seen corresponding path program 9 times [2021-06-05 23:13:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:21,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954777649] [2021-06-05 23:13:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:21,364 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 23:13:21,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:21,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954777649] [2021-06-05 23:13:21,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954777649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:21,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509787405] [2021-06-05 23:13:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:21,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:13:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:21,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:13:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:21,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509787405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:21,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:21,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 23:13:21,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540481797] [2021-06-05 23:13:21,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:13:21,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:21,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:13:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:13:21,453 INFO L87 Difference]: Start difference. First operand 1405 states and 5060 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:21,751 INFO L93 Difference]: Finished difference Result 3015 states and 10002 transitions. [2021-06-05 23:13:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:13:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:13:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:21,762 INFO L225 Difference]: With dead ends: 3015 [2021-06-05 23:13:21,762 INFO L226 Difference]: Without dead ends: 2566 [2021-06-05 23:13:21,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-06-05 23:13:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1717. [2021-06-05 23:13:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states 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 23:13:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2021-06-05 23:13:21,801 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2021-06-05 23:13:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:21,801 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2021-06-05 23:13:21,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2021-06-05 23:13:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:13:21,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:21,805 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:22,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:13:22,021 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1408858976, now seen corresponding path program 10 times [2021-06-05 23:13:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:22,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933272292] [2021-06-05 23:13:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:22,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:22,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933272292] [2021-06-05 23:13:22,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933272292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337530702] [2021-06-05 23:13:22,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:22,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:22,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:22,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337530702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:22,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:13:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153033216] [2021-06-05 23:13:22,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:13:22,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:13:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:13:22,135 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:22,201 INFO L93 Difference]: Finished difference Result 3213 states and 10872 transitions. [2021-06-05 23:13:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:13:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:13:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:22,213 INFO L225 Difference]: With dead ends: 3213 [2021-06-05 23:13:22,213 INFO L226 Difference]: Without dead ends: 3203 [2021-06-05 23:13:22,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:13:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-06-05 23:13:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2341. [2021-06-05 23:13:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 3.5534188034188032) internal successors, (8315), 2340 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states 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 23:13:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 8315 transitions. [2021-06-05 23:13:22,264 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 8315 transitions. Word has length 28 [2021-06-05 23:13:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:22,264 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 8315 transitions. [2021-06-05 23:13:22,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 8315 transitions. [2021-06-05 23:13:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:13:22,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:22,269 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:22,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:13:22,488 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:22,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1644408306, now seen corresponding path program 11 times [2021-06-05 23:13:22,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:22,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877579119] [2021-06-05 23:13:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:22,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:22,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877579119] [2021-06-05 23:13:22,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877579119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640705980] [2021-06-05 23:13:22,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:13:22,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:22,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:22,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640705980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:22,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 23:13:22,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276014028] [2021-06-05 23:13:22,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:13:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:13:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:13:22,591 INFO L87 Difference]: Start difference. First operand 2341 states and 8315 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:23,137 INFO L93 Difference]: Finished difference Result 6700 states and 22333 transitions. [2021-06-05 23:13:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:13:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:13:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:23,154 INFO L225 Difference]: With dead ends: 6700 [2021-06-05 23:13:23,154 INFO L226 Difference]: Without dead ends: 6522 [2021-06-05 23:13:23,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:13:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-06-05 23:13:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 3855. [2021-06-05 23:13:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3854 states have (on average 3.700311364815776) internal successors, (14261), 3854 states have internal predecessors, (14261), 0 states have call successors, (0), 0 states 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 23:13:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 14261 transitions. [2021-06-05 23:13:23,251 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 14261 transitions. Word has length 28 [2021-06-05 23:13:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:23,251 INFO L482 AbstractCegarLoop]: Abstraction has 3855 states and 14261 transitions. [2021-06-05 23:13:23,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 14261 transitions. [2021-06-05 23:13:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:13:23,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:23,259 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:23,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:13:23,465 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1106764104, now seen corresponding path program 12 times [2021-06-05 23:13:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:23,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122464943] [2021-06-05 23:13:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:23,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122464943] [2021-06-05 23:13:23,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122464943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780929842] [2021-06-05 23:13:23,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:23,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:13:23,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780929842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:23,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:23,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 23:13:23,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307058919] [2021-06-05 23:13:23,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:13:23,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:13:23,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:13:23,560 INFO L87 Difference]: Start difference. First operand 3855 states and 14261 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:23,646 INFO L93 Difference]: Finished difference Result 5643 states and 19918 transitions. [2021-06-05 23:13:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:13:23,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:13:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:23,672 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 23:13:23,672 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 23:13:23,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:13:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 23:13:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4737. [2021-06-05 23:13:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4737 states, 4736 states have (on average 3.6630067567567566) internal successors, (17348), 4736 states have internal predecessors, (17348), 0 states have call successors, (0), 0 states 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 23:13:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 17348 transitions. [2021-06-05 23:13:23,787 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 17348 transitions. Word has length 28 [2021-06-05 23:13:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:23,788 INFO L482 AbstractCegarLoop]: Abstraction has 4737 states and 17348 transitions. [2021-06-05 23:13:23,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 17348 transitions. [2021-06-05 23:13:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:13:23,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:23,797 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:24,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:24,015 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1836774554, now seen corresponding path program 13 times [2021-06-05 23:13:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:24,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700245383] [2021-06-05 23:13:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:24,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:24,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700245383] [2021-06-05 23:13:24,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700245383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:24,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867957347] [2021-06-05 23:13:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:13:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:13:24,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867957347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:24,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:24,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:13:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864610264] [2021-06-05 23:13:24,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:13:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:13:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:13:24,091 INFO L87 Difference]: Start difference. First operand 4737 states and 17348 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:24,180 INFO L93 Difference]: Finished difference Result 5055 states and 18166 transitions. [2021-06-05 23:13:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:13:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:13:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:24,192 INFO L225 Difference]: With dead ends: 5055 [2021-06-05 23:13:24,194 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 23:13:24,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:13:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 23:13:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4680. [2021-06-05 23:13:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 4679 states have (on average 3.663175892284676) internal successors, (17140), 4679 states have internal predecessors, (17140), 0 states have call successors, (0), 0 states 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 23:13:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 17140 transitions. [2021-06-05 23:13:24,302 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 17140 transitions. Word has length 28 [2021-06-05 23:13:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:24,302 INFO L482 AbstractCegarLoop]: Abstraction has 4680 states and 17140 transitions. [2021-06-05 23:13:24,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 17140 transitions. [2021-06-05 23:13:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:24,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:24,310 INFO L554 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] [2021-06-05 23:13:24,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:13:24,525 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1601596804, now seen corresponding path program 14 times [2021-06-05 23:13:24,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:24,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866100493] [2021-06-05 23:13:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:24,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:24,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866100493] [2021-06-05 23:13:24,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866100493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:24,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119268476] [2021-06-05 23:13:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:24,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:24,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:24,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:24,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:24,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:24,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 23:13:24,973 INFO L446 ElimStorePlain]: Different costs {0=[A], 2=[v_C_19]} [2021-06-05 23:13:24,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 23:13:24,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:24,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 23:13:24,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:24,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:24,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:24,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:30 [2021-06-05 23:13:25,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 23:13:25,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:25,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:25,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:25,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 23:13:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:25,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119268476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:25,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:25,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 23:13:25,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191836251] [2021-06-05 23:13:25,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:13:25,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:25,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:13:25,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:13:25,055 INFO L87 Difference]: Start difference. First operand 4680 states and 17140 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:13:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:25,702 INFO L93 Difference]: Finished difference Result 7408 states and 26889 transitions. [2021-06-05 23:13:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:13:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:25,718 INFO L225 Difference]: With dead ends: 7408 [2021-06-05 23:13:25,718 INFO L226 Difference]: Without dead ends: 7387 [2021-06-05 23:13:25,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:13:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2021-06-05 23:13:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 4727. [2021-06-05 23:13:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4727 states, 4726 states have (on average 3.654253068133728) internal successors, (17270), 4726 states have internal predecessors, (17270), 0 states have call successors, (0), 0 states 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 23:13:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4727 states to 4727 states and 17270 transitions. [2021-06-05 23:13:25,822 INFO L78 Accepts]: Start accepts. Automaton has 4727 states and 17270 transitions. Word has length 30 [2021-06-05 23:13:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:25,822 INFO L482 AbstractCegarLoop]: Abstraction has 4727 states and 17270 transitions. [2021-06-05 23:13:25,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:13:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4727 states and 17270 transitions. [2021-06-05 23:13:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:25,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:25,831 INFO L554 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] [2021-06-05 23:13:26,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:26,045 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash 11304900, now seen corresponding path program 15 times [2021-06-05 23:13:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:26,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429973436] [2021-06-05 23:13:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:26,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429973436] [2021-06-05 23:13:26,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429973436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320299449] [2021-06-05 23:13:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:26,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:13:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:13:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:26,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:26,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:26,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:13:26,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-05 23:13:26,657 INFO L446 ElimStorePlain]: Different costs {1=[v_C_21], 6=[A]} [2021-06-05 23:13:26,668 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 23:13:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 23:13:26,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:26,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:26,723 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 23:13:26,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 23:13:26,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:26,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:26,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:13:26,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:51, output treesize:145 [2021-06-05 23:13:27,102 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1], 2=[C]} [2021-06-05 23:13:27,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:13:27,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:27,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 23:13:27,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:27,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:27,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:13:27,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:34 [2021-06-05 23:13:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:27,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320299449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:27,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:27,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:13:27,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894090321] [2021-06-05 23:13:27,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:13:27,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:13:27,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:13:27,259 INFO L87 Difference]: Start difference. First operand 4727 states and 17270 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:13:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:28,719 INFO L93 Difference]: Finished difference Result 7366 states and 26715 transitions. [2021-06-05 23:13:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:13:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:28,731 INFO L225 Difference]: With dead ends: 7366 [2021-06-05 23:13:28,732 INFO L226 Difference]: Without dead ends: 7312 [2021-06-05 23:13:28,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:13:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-06-05 23:13:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 4804. [2021-06-05 23:13:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 3.6420986883198) internal successors, (17493), 4803 states have internal predecessors, (17493), 0 states have call successors, (0), 0 states 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 23:13:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 17493 transitions. [2021-06-05 23:13:28,813 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 17493 transitions. Word has length 30 [2021-06-05 23:13:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:28,813 INFO L482 AbstractCegarLoop]: Abstraction has 4804 states and 17493 transitions. [2021-06-05 23:13:28,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:13:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 17493 transitions. [2021-06-05 23:13:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:28,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:28,821 INFO L554 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] [2021-06-05 23:13:29,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:29,038 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -710829310, now seen corresponding path program 16 times [2021-06-05 23:13:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:29,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394775031] [2021-06-05 23:13:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:29,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:29,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394775031] [2021-06-05 23:13:29,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394775031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:29,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804505340] [2021-06-05 23:13:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:29,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:29,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:29,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:29,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 23:13:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:29,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 23:13:29,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:29,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2021-06-05 23:13:29,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:29,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-05 23:13:29,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:13:29,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:29,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:29,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:13:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:29,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804505340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:29,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:29,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845320547] [2021-06-05 23:13:29,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:29,588 INFO L87 Difference]: Start difference. First operand 4804 states and 17493 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:30,129 INFO L93 Difference]: Finished difference Result 8065 states and 28901 transitions. [2021-06-05 23:13:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:13:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:30,143 INFO L225 Difference]: With dead ends: 8065 [2021-06-05 23:13:30,143 INFO L226 Difference]: Without dead ends: 8023 [2021-06-05 23:13:30,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2021-06-05 23:13:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 4850. [2021-06-05 23:13:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4850 states, 4849 states have (on average 3.6417818106826148) internal successors, (17659), 4849 states have internal predecessors, (17659), 0 states have call successors, (0), 0 states 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 23:13:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 17659 transitions. [2021-06-05 23:13:30,226 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 17659 transitions. Word has length 30 [2021-06-05 23:13:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:30,227 INFO L482 AbstractCegarLoop]: Abstraction has 4850 states and 17659 transitions. [2021-06-05 23:13:30,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 17659 transitions. [2021-06-05 23:13:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:30,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:30,234 INFO L554 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] [2021-06-05 23:13:30,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 23:13:30,446 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2079167272, now seen corresponding path program 17 times [2021-06-05 23:13:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:30,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009815176] [2021-06-05 23:13:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009815176] [2021-06-05 23:13:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009815176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955755560] [2021-06-05 23:13:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:30,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:13:30,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:13:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:30,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:30,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:30,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:30,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:30,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 23:13:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 23:13:30,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:30,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:30,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-06-05 23:13:30,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:30,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:30,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:30,902 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 23:13:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:31,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 23:13:31,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:13:31,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:31,024 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 23:13:31,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-06-05 23:13:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:31,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955755560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 23:13:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135664260] [2021-06-05 23:13:31,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:13:31,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:13:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:13:31,093 INFO L87 Difference]: Start difference. First operand 4850 states and 17659 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:13:31,514 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 23:13:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:32,164 INFO L93 Difference]: Finished difference Result 8106 states and 29154 transitions. [2021-06-05 23:13:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:13:32,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:32,178 INFO L225 Difference]: With dead ends: 8106 [2021-06-05 23:13:32,178 INFO L226 Difference]: Without dead ends: 8079 [2021-06-05 23:13:32,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 970.1ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:13:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-06-05 23:13:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 4912. [2021-06-05 23:13:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 3.6424353492160457) internal successors, (17888), 4911 states have internal predecessors, (17888), 0 states have call successors, (0), 0 states 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 23:13:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 17888 transitions. [2021-06-05 23:13:32,266 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 17888 transitions. Word has length 30 [2021-06-05 23:13:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:32,266 INFO L482 AbstractCegarLoop]: Abstraction has 4912 states and 17888 transitions. [2021-06-05 23:13:32,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:13:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 17888 transitions. [2021-06-05 23:13:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:32,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:32,274 INFO L554 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] [2021-06-05 23:13:32,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:32,489 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1068514906, now seen corresponding path program 18 times [2021-06-05 23:13:32,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:32,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356476755] [2021-06-05 23:13:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:32,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356476755] [2021-06-05 23:13:32,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356476755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047886281] [2021-06-05 23:13:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:32,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:13:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:32,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:32,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:32,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:32,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:32,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 23:13:32,952 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 2=[A]} [2021-06-05 23:13:32,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:13:32,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:32,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:32,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 23:13:32,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:32,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:32,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:32,984 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:37 [2021-06-05 23:13:33,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:13:33,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:33,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:33,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:33,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:13:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047886281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:33,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:33,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:33,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603930916] [2021-06-05 23:13:33,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:33,049 INFO L87 Difference]: Start difference. First operand 4912 states and 17888 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:33,913 INFO L93 Difference]: Finished difference Result 8129 states and 29154 transitions. [2021-06-05 23:13:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:13:33,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:33,927 INFO L225 Difference]: With dead ends: 8129 [2021-06-05 23:13:33,928 INFO L226 Difference]: Without dead ends: 8071 [2021-06-05 23:13:33,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2021-06-05 23:13:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 4920. [2021-06-05 23:13:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 3.6413905265297823) internal successors, (17912), 4919 states have internal predecessors, (17912), 0 states have call successors, (0), 0 states 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 23:13:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 17912 transitions. [2021-06-05 23:13:34,014 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 17912 transitions. Word has length 30 [2021-06-05 23:13:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:34,015 INFO L482 AbstractCegarLoop]: Abstraction has 4920 states and 17912 transitions. [2021-06-05 23:13:34,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 17912 transitions. [2021-06-05 23:13:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:34,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:34,023 INFO L554 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] [2021-06-05 23:13:34,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:13:34,238 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 518844538, now seen corresponding path program 19 times [2021-06-05 23:13:34,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:34,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980385453] [2021-06-05 23:13:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:34,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:34,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980385453] [2021-06-05 23:13:34,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980385453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:34,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895404045] [2021-06-05 23:13:34,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:34,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:34,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 23:13:34,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:13:34,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:34,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:45 [2021-06-05 23:13:34,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 23:13:34,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:34,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-06-05 23:13:34,753 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 23:13:34,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 23:13:34,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:34,761 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 23:13:34,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:15 [2021-06-05 23:13:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:34,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895404045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:34,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:34,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98218316] [2021-06-05 23:13:34,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:34,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:34,796 INFO L87 Difference]: Start difference. First operand 4920 states and 17912 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:35,199 INFO L93 Difference]: Finished difference Result 7550 states and 27431 transitions. [2021-06-05 23:13:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:13:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:35,212 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 23:13:35,212 INFO L226 Difference]: Without dead ends: 7529 [2021-06-05 23:13:35,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7529 states. [2021-06-05 23:13:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7529 to 4944. [2021-06-05 23:13:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4943 states have (on average 3.639490188144851) internal successors, (17990), 4943 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states 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 23:13:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 17990 transitions. [2021-06-05 23:13:35,300 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 17990 transitions. Word has length 30 [2021-06-05 23:13:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:35,301 INFO L482 AbstractCegarLoop]: Abstraction has 4944 states and 17990 transitions. [2021-06-05 23:13:35,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 17990 transitions. [2021-06-05 23:13:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:35,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:35,316 INFO L554 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] [2021-06-05 23:13:35,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:13:35,537 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1253982764, now seen corresponding path program 20 times [2021-06-05 23:13:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:35,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326921883] [2021-06-05 23:13:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:35,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:35,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326921883] [2021-06-05 23:13:35,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326921883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:35,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344678581] [2021-06-05 23:13:35,719 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 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 23:13:35,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:35,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:35,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:35,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 23:13:35,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:35,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 23:13:35,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:35,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:58 [2021-06-05 23:13:35,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 23:13:35,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:35,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:34 [2021-06-05 23:13:35,962 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 23:13:35,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 23:13:35,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:35,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:35,970 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 23:13:35,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 23:13:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:36,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344678581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:36,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:36,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:36,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808757338] [2021-06-05 23:13:36,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:36,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:36,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:36,057 INFO L87 Difference]: Start difference. First operand 4944 states and 17990 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:36,955 INFO L93 Difference]: Finished difference Result 9089 states and 32823 transitions. [2021-06-05 23:13:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:13:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:36,971 INFO L225 Difference]: With dead ends: 9089 [2021-06-05 23:13:36,971 INFO L226 Difference]: Without dead ends: 9068 [2021-06-05 23:13:36,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:13:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9068 states. [2021-06-05 23:13:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9068 to 4947. [2021-06-05 23:13:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4947 states, 4946 states have (on average 3.6403154063890013) internal successors, (18005), 4946 states have internal predecessors, (18005), 0 states have call successors, (0), 0 states 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 23:13:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 18005 transitions. [2021-06-05 23:13:37,059 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 18005 transitions. Word has length 30 [2021-06-05 23:13:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:37,060 INFO L482 AbstractCegarLoop]: Abstraction has 4947 states and 18005 transitions. [2021-06-05 23:13:37,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 18005 transitions. [2021-06-05 23:13:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:37,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:37,067 INFO L554 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] [2021-06-05 23:13:37,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:37,268 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -901607074, now seen corresponding path program 21 times [2021-06-05 23:13:37,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:37,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071477847] [2021-06-05 23:13:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:37,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:37,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071477847] [2021-06-05 23:13:37,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071477847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:37,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324992836] [2021-06-05 23:13:37,463 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 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 23:13:37,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:13:37,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:13:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:37,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:37,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:37,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:37,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:37,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 23:13:37,659 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 23:13:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 23:13:37,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:37,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:37,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:37,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:58 [2021-06-05 23:13:37,723 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 23:13:37,723 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 45 [2021-06-05 23:13:37,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:37,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:37,752 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 23:13:37,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:94 [2021-06-05 23:13:37,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:37,853 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 50 treesize of output 56 [2021-06-05 23:13:37,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:13:37,882 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 23:13:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 10 [2021-06-05 23:13:37,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:37,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:37,892 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 9 treesize of output 14 [2021-06-05 23:13:37,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:13:38,006 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 23:13:38,007 INFO L628 ElimStorePlain]: treesize reduction 119, result has 55.1 percent of original size [2021-06-05 23:13:38,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:13:38,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:128, output treesize:239 [2021-06-05 23:13:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:38,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324992836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:38,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:38,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 23:13:38,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623462483] [2021-06-05 23:13:38,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:13:38,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:38,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:13:38,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:38,304 INFO L87 Difference]: Start difference. First operand 4947 states and 18005 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 23:13:40,113 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-05 23:13:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:41,370 INFO L93 Difference]: Finished difference Result 8657 states and 30784 transitions. [2021-06-05 23:13:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:13:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 30 [2021-06-05 23:13:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:41,384 INFO L225 Difference]: With dead ends: 8657 [2021-06-05 23:13:41,384 INFO L226 Difference]: Without dead ends: 8556 [2021-06-05 23:13:41,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2753.5ms TimeCoverageRelationStatistics Valid=426, Invalid=2330, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:13:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-06-05 23:13:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 4982. [2021-06-05 23:13:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 4981 states have (on average 3.6402328849628587) internal successors, (18132), 4981 states have internal predecessors, (18132), 0 states have call successors, (0), 0 states 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 23:13:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 18132 transitions. [2021-06-05 23:13:41,472 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 18132 transitions. Word has length 30 [2021-06-05 23:13:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:41,472 INFO L482 AbstractCegarLoop]: Abstraction has 4982 states and 18132 transitions. [2021-06-05 23:13:41,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 23:13:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 18132 transitions. [2021-06-05 23:13:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:41,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:41,480 INFO L554 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] [2021-06-05 23:13:41,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 23:13:41,680 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1440214972, now seen corresponding path program 22 times [2021-06-05 23:13:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719640951] [2021-06-05 23:13:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:41,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719640951] [2021-06-05 23:13:41,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719640951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186963159] [2021-06-05 23:13:41,875 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 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 23:13:41,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:41,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:41,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:41,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:41,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:41,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:41,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 23:13:42,137 INFO L446 ElimStorePlain]: Different costs {1=[v_C_35], 3=[A]} [2021-06-05 23:13:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 23:13:42,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,164 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 23:13:42,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 29 [2021-06-05 23:13:42,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:42,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:45 [2021-06-05 23:13:42,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:13:42,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:42,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:15 [2021-06-05 23:13:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:42,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186963159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:42,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:42,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626164275] [2021-06-05 23:13:42,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:42,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:42,240 INFO L87 Difference]: Start difference. First operand 4982 states and 18132 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:42,798 INFO L93 Difference]: Finished difference Result 8142 states and 29267 transitions. [2021-06-05 23:13:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:13:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:42,811 INFO L225 Difference]: With dead ends: 8142 [2021-06-05 23:13:42,811 INFO L226 Difference]: Without dead ends: 8100 [2021-06-05 23:13:42,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-06-05 23:13:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 5028. [2021-06-05 23:13:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 3.6399443007758108) internal successors, (18298), 5027 states have internal predecessors, (18298), 0 states have call successors, (0), 0 states 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 23:13:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 18298 transitions. [2021-06-05 23:13:42,898 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 18298 transitions. Word has length 30 [2021-06-05 23:13:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:42,898 INFO L482 AbstractCegarLoop]: Abstraction has 5028 states and 18298 transitions. [2021-06-05 23:13:42,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 18298 transitions. [2021-06-05 23:13:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:42,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:42,909 INFO L554 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] [2021-06-05 23:13:43,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:43,110 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1486414362, now seen corresponding path program 23 times [2021-06-05 23:13:43,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:43,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782990410] [2021-06-05 23:13:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:43,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:43,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782990410] [2021-06-05 23:13:43,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782990410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:43,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532817425] [2021-06-05 23:13:43,436 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 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 23:13:43,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:13:43,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:13:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:43,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:43,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:43,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:43,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 23:13:43,629 INFO L446 ElimStorePlain]: Different costs {1=[v_C_37], 3=[A]} [2021-06-05 23:13:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:43,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:13:43,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:43,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:43,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:43,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:43,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:43,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 33 [2021-06-05 23:13:43,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:43,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:43,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:43,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:62 [2021-06-05 23:13:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 23:13:43,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:43,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:43,780 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 23:13:43,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:33 [2021-06-05 23:13:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:43,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532817425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:43,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:43,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 23:13:43,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359319775] [2021-06-05 23:13:43,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:13:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:43,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:13:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:13:43,854 INFO L87 Difference]: Start difference. First operand 5028 states and 18298 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 23:13:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:44,607 INFO L93 Difference]: Finished difference Result 7991 states and 28855 transitions. [2021-06-05 23:13:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:13:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 30 [2021-06-05 23:13:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:44,619 INFO L225 Difference]: With dead ends: 7991 [2021-06-05 23:13:44,620 INFO L226 Difference]: Without dead ends: 7952 [2021-06-05 23:13:44,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:13:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7952 states. [2021-06-05 23:13:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7952 to 5159. [2021-06-05 23:13:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 3.630864676231097) internal successors, (18728), 5158 states have internal predecessors, (18728), 0 states have call successors, (0), 0 states 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 23:13:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 18728 transitions. [2021-06-05 23:13:44,701 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 18728 transitions. Word has length 30 [2021-06-05 23:13:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:44,701 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 18728 transitions. [2021-06-05 23:13:44,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 23:13:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 18728 transitions. [2021-06-05 23:13:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:44,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:44,708 INFO L554 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] [2021-06-05 23:13:44,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 23:13:44,921 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash 911205050, now seen corresponding path program 24 times [2021-06-05 23:13:44,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:44,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712703428] [2021-06-05 23:13:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:45,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712703428] [2021-06-05 23:13:45,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712703428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046625199] [2021-06-05 23:13:45,095 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 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 23:13:45,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:13:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:45,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:45,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 23:13:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:45,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:13:45,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:45,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 23:13:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 23:13:45,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:45,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:31 [2021-06-05 23:13:45,358 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 23:13:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 23:13:45,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:45,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:45,366 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 23:13:45,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 23:13:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:45,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046625199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:45,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:45,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:45,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98225195] [2021-06-05 23:13:45,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:45,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:45,423 INFO L87 Difference]: Start difference. First operand 5159 states and 18728 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:46,325 INFO L93 Difference]: Finished difference Result 8555 states and 30791 transitions. [2021-06-05 23:13:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:13:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:46,338 INFO L225 Difference]: With dead ends: 8555 [2021-06-05 23:13:46,339 INFO L226 Difference]: Without dead ends: 8516 [2021-06-05 23:13:46,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:13:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8516 states. [2021-06-05 23:13:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8516 to 5256. [2021-06-05 23:13:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 3.625880114176974) internal successors, (19054), 5255 states have internal predecessors, (19054), 0 states have call successors, (0), 0 states 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 23:13:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 19054 transitions. [2021-06-05 23:13:46,418 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 19054 transitions. Word has length 30 [2021-06-05 23:13:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:46,418 INFO L482 AbstractCegarLoop]: Abstraction has 5256 states and 19054 transitions. [2021-06-05 23:13:46,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 19054 transitions. [2021-06-05 23:13:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:46,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:46,425 INFO L554 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] [2021-06-05 23:13:46,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:46,625 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:46,625 INFO L82 PathProgramCache]: Analyzing trace with hash -509246562, now seen corresponding path program 25 times [2021-06-05 23:13:46,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:46,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279616866] [2021-06-05 23:13:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:46,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279616866] [2021-06-05 23:13:46,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279616866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133046460] [2021-06-05 23:13:46,814 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 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 23:13:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:46,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:46,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:46,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:46,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:46,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 23:13:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:46,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:13:46,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:46,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:46,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:46,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 23:13:47,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:47,049 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 23:13:47,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 33 [2021-06-05 23:13:47,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:47,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:47,060 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 23:13:47,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:52 [2021-06-05 23:13:47,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 23:13:47,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:47,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:47,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:47,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 23:13:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133046460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676157570] [2021-06-05 23:13:47,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:47,152 INFO L87 Difference]: Start difference. First operand 5256 states and 19054 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:47,688 INFO L93 Difference]: Finished difference Result 8433 states and 30286 transitions. [2021-06-05 23:13:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:13:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:47,701 INFO L225 Difference]: With dead ends: 8433 [2021-06-05 23:13:47,702 INFO L226 Difference]: Without dead ends: 8359 [2021-06-05 23:13:47,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2021-06-05 23:13:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 5263. [2021-06-05 23:13:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 3.6244773850247056) internal successors, (19072), 5262 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states 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 23:13:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 19072 transitions. [2021-06-05 23:13:47,779 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 19072 transitions. Word has length 30 [2021-06-05 23:13:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:47,779 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 19072 transitions. [2021-06-05 23:13:47,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 19072 transitions. [2021-06-05 23:13:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:47,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:47,786 INFO L554 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] [2021-06-05 23:13:47,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 23:13:47,986 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1576620264, now seen corresponding path program 26 times [2021-06-05 23:13:47,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:47,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075706895] [2021-06-05 23:13:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:48,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:48,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075706895] [2021-06-05 23:13:48,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075706895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:48,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498954110] [2021-06-05 23:13:48,192 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 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 23:13:48,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:48,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:48,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:48,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:48,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:48,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 23:13:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:13:48,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:48,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 23:13:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:48,372 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 23:13:48,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 23:13:48,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:48,384 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 23:13:48,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:53 [2021-06-05 23:13:48,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 23:13:48,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:48,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:48,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 23:13:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:48,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498954110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:48,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:48,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:48,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984869053] [2021-06-05 23:13:48,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:48,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:48,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:48,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:48,500 INFO L87 Difference]: Start difference. First operand 5263 states and 19072 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:49,118 INFO L93 Difference]: Finished difference Result 8516 states and 30518 transitions. [2021-06-05 23:13:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:13:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 23:13:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:49,133 INFO L225 Difference]: With dead ends: 8516 [2021-06-05 23:13:49,133 INFO L226 Difference]: Without dead ends: 8417 [2021-06-05 23:13:49,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2021-06-05 23:13:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 5307. [2021-06-05 23:13:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5306 states have (on average 3.626460610629476) internal successors, (19242), 5306 states have internal predecessors, (19242), 0 states have call successors, (0), 0 states 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 23:13:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 19242 transitions. [2021-06-05 23:13:49,210 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 19242 transitions. Word has length 30 [2021-06-05 23:13:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:49,210 INFO L482 AbstractCegarLoop]: Abstraction has 5307 states and 19242 transitions. [2021-06-05 23:13:49,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 23:13:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 19242 transitions. [2021-06-05 23:13:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:49,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:49,217 INFO L554 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] [2021-06-05 23:13:49,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:49,421 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1298274782, now seen corresponding path program 27 times [2021-06-05 23:13:49,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:49,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587576895] [2021-06-05 23:13:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:49,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:49,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587576895] [2021-06-05 23:13:49,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587576895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:49,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163058643] [2021-06-05 23:13:49,626 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 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 23:13:49,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:13:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:13:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:49,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:49,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:49,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:49,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:49,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 23:13:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:13:49,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:49,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:49,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:49,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 23:13:49,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:49,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 23:13:49,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:49,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:49,903 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 23:13:49,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:82 [2021-06-05 23:13:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:49,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:49,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 23:13:49,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:50,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:50,002 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 23:13:50,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 23:13:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:50,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163058643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:50,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:50,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 23:13:50,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813840485] [2021-06-05 23:13:50,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:13:50,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:50,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:13:50,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:13:50,056 INFO L87 Difference]: Start difference. First operand 5307 states and 19242 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:50,851 INFO L93 Difference]: Finished difference Result 7935 states and 28752 transitions. [2021-06-05 23:13:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:13:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:50,886 INFO L225 Difference]: With dead ends: 7935 [2021-06-05 23:13:50,886 INFO L226 Difference]: Without dead ends: 7914 [2021-06-05 23:13:50,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7914 states. [2021-06-05 23:13:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7914 to 5331. [2021-06-05 23:13:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.625140712945591) internal successors, (19322), 5330 states have internal predecessors, (19322), 0 states have call successors, (0), 0 states 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 23:13:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 19322 transitions. [2021-06-05 23:13:50,957 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 19322 transitions. Word has length 30 [2021-06-05 23:13:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:50,957 INFO L482 AbstractCegarLoop]: Abstraction has 5331 states and 19322 transitions. [2021-06-05 23:13:50,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 19322 transitions. [2021-06-05 23:13:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:50,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:50,964 INFO L554 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] [2021-06-05 23:13:51,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 23:13:51,165 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:51,165 INFO L82 PathProgramCache]: Analyzing trace with hash -474552520, now seen corresponding path program 28 times [2021-06-05 23:13:51,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:51,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909357410] [2021-06-05 23:13:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:51,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:51,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909357410] [2021-06-05 23:13:51,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909357410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:51,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957836523] [2021-06-05 23:13:51,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:13:51,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:51,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:51,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:51,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:51,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:51,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 23:13:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:51,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 23:13:51,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:51,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:56 [2021-06-05 23:13:51,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 23:13:51,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:51,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:33 [2021-06-05 23:13:51,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:51,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:51,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 23:13:51,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:51,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:51,617 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 23:13:51,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:17 [2021-06-05 23:13:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:51,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957836523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:51,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:51,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:13:51,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909560237] [2021-06-05 23:13:51,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:13:51,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:13:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:13:51,667 INFO L87 Difference]: Start difference. First operand 5331 states and 19322 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:52,554 INFO L93 Difference]: Finished difference Result 9749 states and 35110 transitions. [2021-06-05 23:13:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:13:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:52,571 INFO L225 Difference]: With dead ends: 9749 [2021-06-05 23:13:52,571 INFO L226 Difference]: Without dead ends: 9728 [2021-06-05 23:13:52,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-06-05 23:13:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 5333. [2021-06-05 23:13:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 3.624906226556639) internal successors, (19328), 5332 states have internal predecessors, (19328), 0 states have call successors, (0), 0 states 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 23:13:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 19328 transitions. [2021-06-05 23:13:52,693 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 19328 transitions. Word has length 30 [2021-06-05 23:13:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:52,693 INFO L482 AbstractCegarLoop]: Abstraction has 5333 states and 19328 transitions. [2021-06-05 23:13:52,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 19328 transitions. [2021-06-05 23:13:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:52,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:52,700 INFO L554 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] [2021-06-05 23:13:52,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:52,901 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -122176830, now seen corresponding path program 29 times [2021-06-05 23:13:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:52,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265210502] [2021-06-05 23:13:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:53,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:53,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265210502] [2021-06-05 23:13:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265210502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079362153] [2021-06-05 23:13:53,103 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 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 23:13:53,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:13:53,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:13:53,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:53,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:53,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:53,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 23:13:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,345 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:13:53,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-06-05 23:13:53,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:53,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:13:53,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 23:13:53,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 38 [2021-06-05 23:13:53,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:53,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:13:53,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:100, output treesize:57 [2021-06-05 23:13:53,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:53,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 23:13:53,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:13:53,545 INFO L628 ElimStorePlain]: treesize reduction 22, result has 62.7 percent of original size [2021-06-05 23:13:53,550 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 23:13:53,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:21 [2021-06-05 23:13:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:53,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079362153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:53,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:53,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:13:53,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529739973] [2021-06-05 23:13:53,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:13:53,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:53,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:13:53,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:53,619 INFO L87 Difference]: Start difference. First operand 5333 states and 19328 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:13:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:54,899 INFO L93 Difference]: Finished difference Result 8721 states and 31251 transitions. [2021-06-05 23:13:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:13:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:54,913 INFO L225 Difference]: With dead ends: 8721 [2021-06-05 23:13:54,913 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 23:13:54,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:13:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 23:13:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 5338. [2021-06-05 23:13:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.6245081506464305) internal successors, (19344), 5337 states have internal predecessors, (19344), 0 states have call successors, (0), 0 states 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 23:13:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 19344 transitions. [2021-06-05 23:13:54,993 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 19344 transitions. Word has length 30 [2021-06-05 23:13:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:54,994 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 19344 transitions. [2021-06-05 23:13:54,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:13:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 19344 transitions. [2021-06-05 23:13:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:55,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:55,000 INFO L554 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] [2021-06-05 23:13:55,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:55,201 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1021403778, now seen corresponding path program 30 times [2021-06-05 23:13:55,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:55,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932427953] [2021-06-05 23:13:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:55,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932427953] [2021-06-05 23:13:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932427953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963969639] [2021-06-05 23:13:55,443 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 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 23:13:55,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:13:55,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:13:55,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:55,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:13:55,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:55,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 23:13:55,648 INFO L446 ElimStorePlain]: Different costs {0=[v_C_51], 2=[A]} [2021-06-05 23:13:55,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:13:55,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:55,670 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 23:13:55,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 31 [2021-06-05 23:13:55,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:55,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:43 [2021-06-05 23:13:55,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:55,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2021-06-05 23:13:55,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:55,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:13:55,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:79 [2021-06-05 23:13:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:55,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963969639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:55,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:55,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:13:55,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105556125] [2021-06-05 23:13:55,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:13:55,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:55,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:13:55,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:13:55,848 INFO L87 Difference]: Start difference. First operand 5338 states and 19344 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:56,585 INFO L93 Difference]: Finished difference Result 8676 states and 31046 transitions. [2021-06-05 23:13:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:13:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:56,600 INFO L225 Difference]: With dead ends: 8676 [2021-06-05 23:13:56,600 INFO L226 Difference]: Without dead ends: 8655 [2021-06-05 23:13:56,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:13:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-05 23:13:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 5360. [2021-06-05 23:13:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 3.6215711886546) internal successors, (19408), 5359 states have internal predecessors, (19408), 0 states have call successors, (0), 0 states 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 23:13:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 19408 transitions. [2021-06-05 23:13:56,680 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 19408 transitions. Word has length 30 [2021-06-05 23:13:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:56,680 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 19408 transitions. [2021-06-05 23:13:56,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 19408 transitions. [2021-06-05 23:13:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:56,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:56,688 INFO L554 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] [2021-06-05 23:13:56,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:13:56,896 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1905225556, now seen corresponding path program 31 times [2021-06-05 23:13:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:56,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134402565] [2021-06-05 23:13:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:57,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134402565] [2021-06-05 23:13:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134402565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276542105] [2021-06-05 23:13:57,180 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 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 23:13:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:57,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:57,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:57,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:57,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:57,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 23:13:57,409 INFO L446 ElimStorePlain]: Different costs {1=[v_C_53], 3=[A]} [2021-06-05 23:13:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:57,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:13:57,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:57,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:57,439 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-06-05 23:13:57,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 23:13:57,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:57,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:57,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:57,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:52 [2021-06-05 23:13:57,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 23:13:57,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:57,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:57,531 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 23:13:57,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:14 [2021-06-05 23:13:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:57,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276542105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:57,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:57,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 23:13:57,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680838661] [2021-06-05 23:13:57,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:13:57,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:13:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:13:57,567 INFO L87 Difference]: Start difference. First operand 5360 states and 19408 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:58,750 INFO L93 Difference]: Finished difference Result 8842 states and 31468 transitions. [2021-06-05 23:13:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:13:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:13:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:58,765 INFO L225 Difference]: With dead ends: 8842 [2021-06-05 23:13:58,766 INFO L226 Difference]: Without dead ends: 8788 [2021-06-05 23:13:58,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 909.0ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-06-05 23:13:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 5359. [2021-06-05 23:13:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 3.625793206420306) internal successors, (19427), 5358 states have internal predecessors, (19427), 0 states have call successors, (0), 0 states 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 23:13:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 19427 transitions. [2021-06-05 23:13:58,853 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 19427 transitions. Word has length 30 [2021-06-05 23:13:58,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:58,853 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 19427 transitions. [2021-06-05 23:13:58,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 19427 transitions. [2021-06-05 23:13:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:13:58,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:58,860 INFO L554 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] [2021-06-05 23:13:59,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:59,076 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash -280805828, now seen corresponding path program 32 times [2021-06-05 23:13:59,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:59,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981117] [2021-06-05 23:13:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:59,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:59,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981117] [2021-06-05 23:13:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:59,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502840611] [2021-06-05 23:13:59,256 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 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 23:13:59,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:59,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:13:59,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:13:59,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:59,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 23:13:59,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:13:59,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:59,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 23:13:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 23:13:59,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:59,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-06-05 23:13:59,491 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 23:13:59,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 23:13:59,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:59,499 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 23:13:59,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 23:13:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:59,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502840611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:59,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:59,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:13:59,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527089479] [2021-06-05 23:13:59,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:13:59,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:13:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:13:59,551 INFO L87 Difference]: Start difference. First operand 5359 states and 19427 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:00,409 INFO L93 Difference]: Finished difference Result 9600 states and 34572 transitions. [2021-06-05 23:14:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:14:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:00,426 INFO L225 Difference]: With dead ends: 9600 [2021-06-05 23:14:00,426 INFO L226 Difference]: Without dead ends: 9579 [2021-06-05 23:14:00,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:14:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9579 states. [2021-06-05 23:14:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9579 to 5333. [2021-06-05 23:14:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 3.627344336084021) internal successors, (19341), 5332 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states 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 23:14:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 19341 transitions. [2021-06-05 23:14:00,514 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 19341 transitions. Word has length 30 [2021-06-05 23:14:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:00,514 INFO L482 AbstractCegarLoop]: Abstraction has 5333 states and 19341 transitions. [2021-06-05 23:14:00,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 19341 transitions. [2021-06-05 23:14:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:00,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:00,521 INFO L554 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] [2021-06-05 23:14:00,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 23:14:00,737 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash -90435368, now seen corresponding path program 33 times [2021-06-05 23:14:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:00,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879132222] [2021-06-05 23:14:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:00,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879132222] [2021-06-05 23:14:00,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879132222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967930262] [2021-06-05 23:14:00,929 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 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 23:14:00,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:14:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:14:00,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:00,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:00,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:00,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:00,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:00,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 23:14:01,043 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 23:14:01,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 23:14:01,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:01,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:01,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:01,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 23:14:01,181 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 23:14:01,181 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 40 treesize of output 36 [2021-06-05 23:14:01,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:01,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:01,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:01,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:66 [2021-06-05 23:14:01,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:14:01,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:01,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:01,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:01,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 23:14:01,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:01,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:14:01,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:01,326 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.5 percent of original size [2021-06-05 23:14:01,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:14:01,327 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:85, output treesize:43 [2021-06-05 23:14:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:01,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967930262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:01,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:01,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 23:14:01,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386010010] [2021-06-05 23:14:01,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:01,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:01,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:01,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:01,428 INFO L87 Difference]: Start difference. First operand 5333 states and 19341 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:03,962 INFO L93 Difference]: Finished difference Result 9517 states and 33779 transitions. [2021-06-05 23:14:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:14:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:03,978 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 23:14:03,978 INFO L226 Difference]: Without dead ends: 9332 [2021-06-05 23:14:03,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1765.5ms TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:14:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-06-05 23:14:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 5481. [2021-06-05 23:14:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 3.6350364963503647) internal successors, (19920), 5480 states have internal predecessors, (19920), 0 states have call successors, (0), 0 states 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 23:14:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 19920 transitions. [2021-06-05 23:14:04,061 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 19920 transitions. Word has length 30 [2021-06-05 23:14:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:04,061 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 19920 transitions. [2021-06-05 23:14:04,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 19920 transitions. [2021-06-05 23:14:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:04,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:04,068 INFO L554 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] [2021-06-05 23:14:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:04,273 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1157809070, now seen corresponding path program 34 times [2021-06-05 23:14:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:04,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844142566] [2021-06-05 23:14:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:04,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844142566] [2021-06-05 23:14:04,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844142566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934036257] [2021-06-05 23:14:04,478 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 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 23:14:04,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:04,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:04,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:04,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:04,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 23:14:04,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:04,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:14:04,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:04,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 23:14:04,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:04,645 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 23:14:04,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 23:14:04,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:04,656 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 23:14:04,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:48 [2021-06-05 23:14:04,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 23:14:04,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:04,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 23:14:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:04,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934036257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:04,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:04,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:04,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748606555] [2021-06-05 23:14:04,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:04,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:04,758 INFO L87 Difference]: Start difference. First operand 5481 states and 19920 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:05,374 INFO L93 Difference]: Finished difference Result 8596 states and 30994 transitions. [2021-06-05 23:14:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:14:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:05,388 INFO L225 Difference]: With dead ends: 8596 [2021-06-05 23:14:05,389 INFO L226 Difference]: Without dead ends: 8557 [2021-06-05 23:14:05,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:14:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8557 states. [2021-06-05 23:14:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8557 to 5445. [2021-06-05 23:14:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5445 states, 5444 states have (on average 3.635194709772226) internal successors, (19790), 5444 states have internal predecessors, (19790), 0 states have call successors, (0), 0 states 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 23:14:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5445 states to 5445 states and 19790 transitions. [2021-06-05 23:14:05,473 INFO L78 Accepts]: Start accepts. Automaton has 5445 states and 19790 transitions. Word has length 30 [2021-06-05 23:14:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:05,473 INFO L482 AbstractCegarLoop]: Abstraction has 5445 states and 19790 transitions. [2021-06-05 23:14:05,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5445 states and 19790 transitions. [2021-06-05 23:14:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:05,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:05,481 INFO L554 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] [2021-06-05 23:14:05,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 23:14:05,681 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1894214378, now seen corresponding path program 35 times [2021-06-05 23:14:05,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:05,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17853520] [2021-06-05 23:14:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:05,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17853520] [2021-06-05 23:14:05,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17853520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767541829] [2021-06-05 23:14:05,823 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 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 23:14:05,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:14:05,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:14:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:05,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:05,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:05,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:05,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:05,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-06-05 23:14:06,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:06,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 23:14:06,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:06,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 23:14:06,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:06,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:30 [2021-06-05 23:14:06,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:06,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:06,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-06-05 23:14:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:06,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767541829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:06,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:06,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 23:14:06,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400269941] [2021-06-05 23:14:06,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:06,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:06,171 INFO L87 Difference]: Start difference. First operand 5445 states and 19790 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:06,703 INFO L93 Difference]: Finished difference Result 5910 states and 21216 transitions. [2021-06-05 23:14:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:14:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:06,712 INFO L225 Difference]: With dead ends: 5910 [2021-06-05 23:14:06,712 INFO L226 Difference]: Without dead ends: 5889 [2021-06-05 23:14:06,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:14:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2021-06-05 23:14:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 5461. [2021-06-05 23:14:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5461 states, 5460 states have (on average 3.635164835164835) internal successors, (19848), 5460 states have internal predecessors, (19848), 0 states have call successors, (0), 0 states 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 23:14:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5461 states to 5461 states and 19848 transitions. [2021-06-05 23:14:06,778 INFO L78 Accepts]: Start accepts. Automaton has 5461 states and 19848 transitions. Word has length 30 [2021-06-05 23:14:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:06,779 INFO L482 AbstractCegarLoop]: Abstraction has 5461 states and 19848 transitions. [2021-06-05 23:14:06,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5461 states and 19848 transitions. [2021-06-05 23:14:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:06,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:06,786 INFO L554 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] [2021-06-05 23:14:06,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 23:14:06,986 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1851082550, now seen corresponding path program 36 times [2021-06-05 23:14:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:06,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49162416] [2021-06-05 23:14:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:07,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49162416] [2021-06-05 23:14:07,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49162416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655323479] [2021-06-05 23:14:07,137 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 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 23:14:07,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:14:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:07,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:07,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:07,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:07,312 INFO L354 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2021-06-05 23:14:07,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 81 [2021-06-05 23:14:07,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:07,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:50 [2021-06-05 23:14:07,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 23:14:07,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:07,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:31 [2021-06-05 23:14:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:07,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:07,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:07,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:07,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655323479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:07,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:07,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:07,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322757964] [2021-06-05 23:14:07,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:07,469 INFO L87 Difference]: Start difference. First operand 5461 states and 19848 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:08,144 INFO L93 Difference]: Finished difference Result 5947 states and 21347 transitions. [2021-06-05 23:14:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:14:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:08,153 INFO L225 Difference]: With dead ends: 5947 [2021-06-05 23:14:08,153 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 23:14:08,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:14:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 23:14:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 5494. [2021-06-05 23:14:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 3.6309848898598216) internal successors, (19945), 5493 states have internal predecessors, (19945), 0 states have call successors, (0), 0 states 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 23:14:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 19945 transitions. [2021-06-05 23:14:08,217 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 19945 transitions. Word has length 30 [2021-06-05 23:14:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:08,218 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 19945 transitions. [2021-06-05 23:14:08,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 19945 transitions. [2021-06-05 23:14:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:08,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:08,225 INFO L554 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] [2021-06-05 23:14:08,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 23:14:08,426 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash 430630938, now seen corresponding path program 37 times [2021-06-05 23:14:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:08,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049995416] [2021-06-05 23:14:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:08,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:08,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049995416] [2021-06-05 23:14:08,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049995416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:08,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247029769] [2021-06-05 23:14:08,542 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 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 23:14:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:08,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:08,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:08,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:08,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:08,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:08,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:14:08,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:08,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:52 [2021-06-05 23:14:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:08,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-06-05 23:14:08,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:08,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:27 [2021-06-05 23:14:08,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:14:08,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:08,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:12 [2021-06-05 23:14:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:08,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247029769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:08,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:08,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:08,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202412377] [2021-06-05 23:14:08,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:08,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:08,846 INFO L87 Difference]: Start difference. First operand 5494 states and 19945 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:09,508 INFO L93 Difference]: Finished difference Result 6183 states and 22092 transitions. [2021-06-05 23:14:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:14:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:09,518 INFO L225 Difference]: With dead ends: 6183 [2021-06-05 23:14:09,518 INFO L226 Difference]: Without dead ends: 6156 [2021-06-05 23:14:09,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2021-06-05 23:14:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 5494. [2021-06-05 23:14:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 3.6309848898598216) internal successors, (19945), 5493 states have internal predecessors, (19945), 0 states have call successors, (0), 0 states 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 23:14:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 19945 transitions. [2021-06-05 23:14:09,585 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 19945 transitions. Word has length 30 [2021-06-05 23:14:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:09,585 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 19945 transitions. [2021-06-05 23:14:09,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 19945 transitions. [2021-06-05 23:14:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:09,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:09,592 INFO L554 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] [2021-06-05 23:14:09,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 23:14:09,792 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1729453130, now seen corresponding path program 38 times [2021-06-05 23:14:09,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:09,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50696551] [2021-06-05 23:14:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:09,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50696551] [2021-06-05 23:14:09,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50696551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868067329] [2021-06-05 23:14:09,948 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 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 23:14:09,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:10,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:10,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:10,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:10,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:10,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:10,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:10,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:52 [2021-06-05 23:14:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 23:14:10,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:10,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:30 [2021-06-05 23:14:10,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:10,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:10,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:10,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868067329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:10,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:10,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:10,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789894810] [2021-06-05 23:14:10,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:10,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:10,259 INFO L87 Difference]: Start difference. First operand 5494 states and 19945 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:10,893 INFO L93 Difference]: Finished difference Result 5936 states and 21233 transitions. [2021-06-05 23:14:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:14:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:10,902 INFO L225 Difference]: With dead ends: 5936 [2021-06-05 23:14:10,902 INFO L226 Difference]: Without dead ends: 5909 [2021-06-05 23:14:10,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:14:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5909 states. [2021-06-05 23:14:10,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5909 to 5540. [2021-06-05 23:14:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6268279472829033) internal successors, (20089), 5539 states have internal predecessors, (20089), 0 states have call successors, (0), 0 states 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 23:14:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20089 transitions. [2021-06-05 23:14:10,967 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20089 transitions. Word has length 30 [2021-06-05 23:14:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:10,967 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20089 transitions. [2021-06-05 23:14:10,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20089 transitions. [2021-06-05 23:14:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:10,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:10,974 INFO L554 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] [2021-06-05 23:14:11,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:11,174 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:11,175 INFO L82 PathProgramCache]: Analyzing trace with hash -983852134, now seen corresponding path program 39 times [2021-06-05 23:14:11,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:11,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777430051] [2021-06-05 23:14:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:11,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:11,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777430051] [2021-06-05 23:14:11,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777430051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:11,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725206482] [2021-06-05 23:14:11,282 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 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 23:14:11,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:14:11,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:14:11,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:11,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:11,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:11,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:11,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 23:14:11,416 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 23:14:11,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-06-05 23:14:11,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:11,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:11,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:11,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:44 [2021-06-05 23:14:11,544 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 23:14:11,545 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 29 treesize of output 39 [2021-06-05 23:14:11,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:11,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:11,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:11,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:117 [2021-06-05 23:14:11,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:11,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:11,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 23:14:11,764 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:14:11,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:11,780 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 23:14:11,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:42 [2021-06-05 23:14:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:11,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725206482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:11,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:11,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-06-05 23:14:11,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171060537] [2021-06-05 23:14:11,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:14:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:14:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:14:11,884 INFO L87 Difference]: Start difference. First operand 5540 states and 20089 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:13,820 INFO L93 Difference]: Finished difference Result 6092 states and 21727 transitions. [2021-06-05 23:14:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:14:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:13,829 INFO L225 Difference]: With dead ends: 6092 [2021-06-05 23:14:13,829 INFO L226 Difference]: Without dead ends: 6050 [2021-06-05 23:14:13,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1279.5ms TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:14:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6050 states. [2021-06-05 23:14:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6050 to 5604. [2021-06-05 23:14:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5603 states have (on average 3.6234160271283242) internal successors, (20302), 5603 states have internal predecessors, (20302), 0 states have call successors, (0), 0 states 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 23:14:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 20302 transitions. [2021-06-05 23:14:13,895 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 20302 transitions. Word has length 30 [2021-06-05 23:14:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:13,895 INFO L482 AbstractCegarLoop]: Abstraction has 5604 states and 20302 transitions. [2021-06-05 23:14:13,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 20302 transitions. [2021-06-05 23:14:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:13,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:13,902 INFO L554 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] [2021-06-05 23:14:14,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 23:14:14,104 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash -591880358, now seen corresponding path program 40 times [2021-06-05 23:14:14,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:14,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299642532] [2021-06-05 23:14:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:14,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:14,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299642532] [2021-06-05 23:14:14,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299642532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:14,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881234857] [2021-06-05 23:14:14,215 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 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 23:14:14,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:14,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:14,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:14,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:14,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:14,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:14,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:14,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:47 [2021-06-05 23:14:14,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:14,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:14:14,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:14,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-06-05 23:14:14,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:14,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:14,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:14,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881234857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:14,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:14,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:14,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028816268] [2021-06-05 23:14:14,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:14,524 INFO L87 Difference]: Start difference. First operand 5604 states and 20302 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:15,129 INFO L93 Difference]: Finished difference Result 6276 states and 22438 transitions. [2021-06-05 23:14:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:14:15,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:15,139 INFO L225 Difference]: With dead ends: 6276 [2021-06-05 23:14:15,139 INFO L226 Difference]: Without dead ends: 6245 [2021-06-05 23:14:15,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:14:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2021-06-05 23:14:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 5600. [2021-06-05 23:14:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 3.6235041971780677) internal successors, (20288), 5599 states have internal predecessors, (20288), 0 states have call successors, (0), 0 states 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 23:14:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 20288 transitions. [2021-06-05 23:14:15,234 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 20288 transitions. Word has length 30 [2021-06-05 23:14:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:15,234 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 20288 transitions. [2021-06-05 23:14:15,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 20288 transitions. [2021-06-05 23:14:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:15,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:15,241 INFO L554 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] [2021-06-05 23:14:15,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:15,441 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1776448930, now seen corresponding path program 41 times [2021-06-05 23:14:15,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:15,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119241124] [2021-06-05 23:14:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:15,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:15,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119241124] [2021-06-05 23:14:15,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119241124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:15,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433018986] [2021-06-05 23:14:15,561 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 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 23:14:15,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:15,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:15,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:15,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:15,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:15,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:15,742 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:14:15,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-06-05 23:14:15,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:15,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:15,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:15,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-06-05 23:14:15,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:15,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:15,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 23:14:15,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:15,931 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.7 percent of original size [2021-06-05 23:14:15,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:15,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:67 [2021-06-05 23:14:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:16,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 62 [2021-06-05 23:14:16,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 23:14:16,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:16,052 INFO L628 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2021-06-05 23:14:16,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:14:16,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:116, output treesize:20 [2021-06-05 23:14:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:16,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433018986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:16,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:16,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 23:14:16,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954067722] [2021-06-05 23:14:16,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:14:16,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:16,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:14:16,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:16,123 INFO L87 Difference]: Start difference. First operand 5600 states and 20288 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:17,385 INFO L93 Difference]: Finished difference Result 6547 states and 23225 transitions. [2021-06-05 23:14:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:14:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:17,395 INFO L225 Difference]: With dead ends: 6547 [2021-06-05 23:14:17,395 INFO L226 Difference]: Without dead ends: 6526 [2021-06-05 23:14:17,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:14:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-05 23:14:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 5645. [2021-06-05 23:14:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5645 states, 5644 states have (on average 3.6210134656272146) internal successors, (20437), 5644 states have internal predecessors, (20437), 0 states have call successors, (0), 0 states 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 23:14:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5645 states to 5645 states and 20437 transitions. [2021-06-05 23:14:17,466 INFO L78 Accepts]: Start accepts. Automaton has 5645 states and 20437 transitions. Word has length 30 [2021-06-05 23:14:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:17,466 INFO L482 AbstractCegarLoop]: Abstraction has 5645 states and 20437 transitions. [2021-06-05 23:14:17,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5645 states and 20437 transitions. [2021-06-05 23:14:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:17,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:17,473 INFO L554 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] [2021-06-05 23:14:17,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:17,673 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:17,674 INFO L82 PathProgramCache]: Analyzing trace with hash -808388724, now seen corresponding path program 42 times [2021-06-05 23:14:17,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:17,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325635998] [2021-06-05 23:14:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:17,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325635998] [2021-06-05 23:14:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325635998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722708923] [2021-06-05 23:14:17,804 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 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 23:14:17,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:14:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:14:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:17,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:17,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:17,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:17,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:14:17,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:17,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:43 [2021-06-05 23:14:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 23:14:18,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:18,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:18,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:18,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 23:14:18,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 23:14:18,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:18,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:18,145 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 23:14:18,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 23:14:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:18,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722708923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:18,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:18,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 23:14:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033274402] [2021-06-05 23:14:18,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:14:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:18,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:14:18,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:18,234 INFO L87 Difference]: Start difference. First operand 5645 states and 20437 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:19,180 INFO L93 Difference]: Finished difference Result 6011 states and 21494 transitions. [2021-06-05 23:14:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:14:19,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:19,189 INFO L225 Difference]: With dead ends: 6011 [2021-06-05 23:14:19,189 INFO L226 Difference]: Without dead ends: 5996 [2021-06-05 23:14:19,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:14:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-06-05 23:14:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5641. [2021-06-05 23:14:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5640 states have (on average 3.621099290780142) internal successors, (20423), 5640 states have internal predecessors, (20423), 0 states have call successors, (0), 0 states 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 23:14:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 20423 transitions. [2021-06-05 23:14:19,254 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 20423 transitions. Word has length 30 [2021-06-05 23:14:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:19,254 INFO L482 AbstractCegarLoop]: Abstraction has 5641 states and 20423 transitions. [2021-06-05 23:14:19,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 20423 transitions. [2021-06-05 23:14:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:19,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:19,261 INFO L554 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] [2021-06-05 23:14:19,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:19,462 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:19,462 INFO L82 PathProgramCache]: Analyzing trace with hash 935479658, now seen corresponding path program 43 times [2021-06-05 23:14:19,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:19,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038063529] [2021-06-05 23:14:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:19,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:19,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038063529] [2021-06-05 23:14:19,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038063529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:19,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164736583] [2021-06-05 23:14:19,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:19,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:19,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:19,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:14:19,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:19,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:52 [2021-06-05 23:14:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:19,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:14:19,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:19,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-06-05 23:14:19,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:19,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:19,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:19,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:19,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164736583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:19,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:19,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950179580] [2021-06-05 23:14:19,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:19,885 INFO L87 Difference]: Start difference. First operand 5641 states and 20423 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:20,388 INFO L93 Difference]: Finished difference Result 6001 states and 21514 transitions. [2021-06-05 23:14:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:14:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:20,397 INFO L225 Difference]: With dead ends: 6001 [2021-06-05 23:14:20,397 INFO L226 Difference]: Without dead ends: 5962 [2021-06-05 23:14:20,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:14:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2021-06-05 23:14:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5666. [2021-06-05 23:14:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5666 states, 5665 states have (on average 3.6180052956751987) internal successors, (20496), 5665 states have internal predecessors, (20496), 0 states have call successors, (0), 0 states 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 23:14:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 20496 transitions. [2021-06-05 23:14:20,467 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 20496 transitions. Word has length 30 [2021-06-05 23:14:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:20,467 INFO L482 AbstractCegarLoop]: Abstraction has 5666 states and 20496 transitions. [2021-06-05 23:14:20,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 20496 transitions. [2021-06-05 23:14:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:20,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:20,475 INFO L554 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] [2021-06-05 23:14:20,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,675 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash -837347644, now seen corresponding path program 44 times [2021-06-05 23:14:20,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:20,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978003917] [2021-06-05 23:14:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:20,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978003917] [2021-06-05 23:14:20,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978003917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480503757] [2021-06-05 23:14:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:20,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:20,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:20,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:20,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:20,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:20,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:20,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:20,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:20,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:20,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-06-05 23:14:20,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:20,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:20,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:20,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:41 [2021-06-05 23:14:20,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 23:14:20,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:21,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:25 [2021-06-05 23:14:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:21,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:21,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480503757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771320271] [2021-06-05 23:14:21,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:21,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:21,080 INFO L87 Difference]: Start difference. First operand 5666 states and 20496 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:21,681 INFO L93 Difference]: Finished difference Result 6100 states and 21835 transitions. [2021-06-05 23:14:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:14:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:21,691 INFO L225 Difference]: With dead ends: 6100 [2021-06-05 23:14:21,691 INFO L226 Difference]: Without dead ends: 6048 [2021-06-05 23:14:21,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:14:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-06-05 23:14:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 5660. [2021-06-05 23:14:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5660 states, 5659 states have (on average 3.618660540731578) internal successors, (20478), 5659 states have internal predecessors, (20478), 0 states have call successors, (0), 0 states 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 23:14:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 20478 transitions. [2021-06-05 23:14:21,760 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 20478 transitions. Word has length 30 [2021-06-05 23:14:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:21,760 INFO L482 AbstractCegarLoop]: Abstraction has 5660 states and 20478 transitions. [2021-06-05 23:14:21,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 20478 transitions. [2021-06-05 23:14:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:21,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:21,767 INFO L554 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] [2021-06-05 23:14:21,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 23:14:21,968 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:21,968 INFO L82 PathProgramCache]: Analyzing trace with hash -484971954, now seen corresponding path program 45 times [2021-06-05 23:14:21,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:21,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922295400] [2021-06-05 23:14:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:22,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:22,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922295400] [2021-06-05 23:14:22,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922295400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:22,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239378765] [2021-06-05 23:14:22,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:22,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:14:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:14:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:22,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:22,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:22,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:22,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:14:22,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:22,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:22,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 23:14:22,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 23:14:22,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:22,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,330 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 23:14:22,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:75 [2021-06-05 23:14:22,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,389 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 19 treesize of output 21 [2021-06-05 23:14:22,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:22,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,399 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 9 treesize of output 14 [2021-06-05 23:14:22,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:22,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 23:14:22,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:22,490 INFO L628 ElimStorePlain]: treesize reduction 18, result has 83.5 percent of original size [2021-06-05 23:14:22,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:14:22,496 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:93, output treesize:100 [2021-06-05 23:14:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:22,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239378765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:22,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:22,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 23:14:22,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860234079] [2021-06-05 23:14:22,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:14:22,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:14:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:22,637 INFO L87 Difference]: Start difference. First operand 5660 states and 20478 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:24,101 INFO L93 Difference]: Finished difference Result 6800 states and 23987 transitions. [2021-06-05 23:14:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:14:24,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:24,112 INFO L225 Difference]: With dead ends: 6800 [2021-06-05 23:14:24,112 INFO L226 Difference]: Without dead ends: 6773 [2021-06-05 23:14:24,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1042.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:14:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-06-05 23:14:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 5650. [2021-06-05 23:14:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5650 states, 5649 states have (on average 3.6204637989024606) internal successors, (20452), 5649 states have internal predecessors, (20452), 0 states have call successors, (0), 0 states 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 23:14:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5650 states to 5650 states and 20452 transitions. [2021-06-05 23:14:24,179 INFO L78 Accepts]: Start accepts. Automaton has 5650 states and 20452 transitions. Word has length 30 [2021-06-05 23:14:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:24,179 INFO L482 AbstractCegarLoop]: Abstraction has 5650 states and 20452 transitions. [2021-06-05 23:14:24,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5650 states and 20452 transitions. [2021-06-05 23:14:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:24,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:24,186 INFO L554 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] [2021-06-05 23:14:24,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:24,386 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 987993216, now seen corresponding path program 46 times [2021-06-05 23:14:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:24,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202461848] [2021-06-05 23:14:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:24,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202461848] [2021-06-05 23:14:24,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202461848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399822217] [2021-06-05 23:14:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:24,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:24,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:24,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:24,738 INFO L446 ElimStorePlain]: Different costs {0=[A], 1=[v_C_83]} [2021-06-05 23:14:24,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 23:14:24,743 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:24,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-06-05 23:14:24,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:24,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:58, output treesize:43 [2021-06-05 23:14:24,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:14:24,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:24,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:14:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399822217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:24,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761640009] [2021-06-05 23:14:24,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:24,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:24,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:24,831 INFO L87 Difference]: Start difference. First operand 5650 states and 20452 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:26,331 INFO L93 Difference]: Finished difference Result 9623 states and 34104 transitions. [2021-06-05 23:14:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:14:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:26,347 INFO L225 Difference]: With dead ends: 9623 [2021-06-05 23:14:26,348 INFO L226 Difference]: Without dead ends: 9565 [2021-06-05 23:14:26,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:14:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9565 states. [2021-06-05 23:14:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9565 to 5690. [2021-06-05 23:14:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5689 states have (on average 3.621023026894006) internal successors, (20600), 5689 states have internal predecessors, (20600), 0 states have call successors, (0), 0 states 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 23:14:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 20600 transitions. [2021-06-05 23:14:26,438 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 20600 transitions. Word has length 30 [2021-06-05 23:14:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:26,439 INFO L482 AbstractCegarLoop]: Abstraction has 5690 states and 20600 transitions. [2021-06-05 23:14:26,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 20600 transitions. [2021-06-05 23:14:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:26,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:26,446 INFO L554 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] [2021-06-05 23:14:26,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:26,647 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash 438322848, now seen corresponding path program 47 times [2021-06-05 23:14:26,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:26,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402785161] [2021-06-05 23:14:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:26,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402785161] [2021-06-05 23:14:26,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402785161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:26,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019734941] [2021-06-05 23:14:26,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:26,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:26,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:14:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:26,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:26,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:26,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:26,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:26,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:27,038 INFO L354 Elim1Store]: treesize reduction 62, result has 17.3 percent of original size [2021-06-05 23:14:27,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 83 [2021-06-05 23:14:27,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:27,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:27,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:27,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:40 [2021-06-05 23:14:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-06-05 23:14:27,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:27,135 INFO L628 ElimStorePlain]: treesize reduction 33, result has 51.5 percent of original size [2021-06-05 23:14:27,137 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 23:14:27,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-06-05 23:14:27,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:27,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:27,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:27,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:27,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019734941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:27,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:27,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 23:14:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740141201] [2021-06-05 23:14:27,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:27,234 INFO L87 Difference]: Start difference. First operand 5690 states and 20600 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:28,388 INFO L93 Difference]: Finished difference Result 9282 states and 33218 transitions. [2021-06-05 23:14:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:14:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:28,404 INFO L225 Difference]: With dead ends: 9282 [2021-06-05 23:14:28,404 INFO L226 Difference]: Without dead ends: 9210 [2021-06-05 23:14:28,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 843.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:14:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2021-06-05 23:14:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 5726. [2021-06-05 23:14:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.61764192139738) internal successors, (20711), 5725 states have internal predecessors, (20711), 0 states have call successors, (0), 0 states 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 23:14:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 20711 transitions. [2021-06-05 23:14:28,492 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 20711 transitions. Word has length 30 [2021-06-05 23:14:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:28,492 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 20711 transitions. [2021-06-05 23:14:28,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 20711 transitions. [2021-06-05 23:14:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:28,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:28,499 INFO L554 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] [2021-06-05 23:14:28,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:28,700 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1334504454, now seen corresponding path program 48 times [2021-06-05 23:14:28,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:28,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10049377] [2021-06-05 23:14:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:28,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10049377] [2021-06-05 23:14:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10049377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734906002] [2021-06-05 23:14:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:28,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:14:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:28,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:28,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:28,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:28,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:28,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:28,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 23:14:28,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:28,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:28,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:28,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:45 [2021-06-05 23:14:29,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:14:29,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:29,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:29,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:29,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 23:14:29,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:14:29,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:29,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:29,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:29,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:14:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734906002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:29,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:29,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:29,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939423009] [2021-06-05 23:14:29,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:29,084 INFO L87 Difference]: Start difference. First operand 5726 states and 20711 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:30,101 INFO L93 Difference]: Finished difference Result 11286 states and 40280 transitions. [2021-06-05 23:14:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:14:30,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:30,120 INFO L225 Difference]: With dead ends: 11286 [2021-06-05 23:14:30,120 INFO L226 Difference]: Without dead ends: 11232 [2021-06-05 23:14:30,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:14:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11232 states. [2021-06-05 23:14:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11232 to 5720. [2021-06-05 23:14:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 3.6189893337996155) internal successors, (20697), 5719 states have internal predecessors, (20697), 0 states have call successors, (0), 0 states 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 23:14:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 20697 transitions. [2021-06-05 23:14:30,218 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 20697 transitions. Word has length 30 [2021-06-05 23:14:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:30,218 INFO L482 AbstractCegarLoop]: Abstraction has 5720 states and 20697 transitions. [2021-06-05 23:14:30,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 20697 transitions. [2021-06-05 23:14:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:30,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:30,226 INFO L554 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] [2021-06-05 23:14:30,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 23:14:30,426 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash -982128764, now seen corresponding path program 49 times [2021-06-05 23:14:30,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:30,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809437461] [2021-06-05 23:14:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:30,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809437461] [2021-06-05 23:14:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809437461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897132931] [2021-06-05 23:14:30,578 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 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 23:14:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:30,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:30,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:30,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:30,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 23:14:30,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:30,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:55 [2021-06-05 23:14:30,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 23:14:30,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:30,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:14:30,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:14:30,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:30,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:14:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:30,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897132931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:30,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:30,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:30,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317093940] [2021-06-05 23:14:30,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:30,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:30,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:30,839 INFO L87 Difference]: Start difference. First operand 5720 states and 20697 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:32,145 INFO L93 Difference]: Finished difference Result 9882 states and 35134 transitions. [2021-06-05 23:14:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:14:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:32,161 INFO L225 Difference]: With dead ends: 9882 [2021-06-05 23:14:32,161 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 23:14:32,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:14:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 23:14:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 5724. [2021-06-05 23:14:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5723 states have (on average 3.6194303686877514) internal successors, (20714), 5723 states have internal predecessors, (20714), 0 states have call successors, (0), 0 states 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 23:14:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 20714 transitions. [2021-06-05 23:14:32,254 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 20714 transitions. Word has length 30 [2021-06-05 23:14:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:32,254 INFO L482 AbstractCegarLoop]: Abstraction has 5724 states and 20714 transitions. [2021-06-05 23:14:32,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 20714 transitions. [2021-06-05 23:14:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:32,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:32,261 INFO L554 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] [2021-06-05 23:14:32,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 23:14:32,462 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:32,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1881355712, now seen corresponding path program 50 times [2021-06-05 23:14:32,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:32,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243406647] [2021-06-05 23:14:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:32,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:32,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243406647] [2021-06-05 23:14:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243406647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027914958] [2021-06-05 23:14:32,659 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 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 23:14:32,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:32,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:32,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:32,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:32,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:32,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-06-05 23:14:32,846 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:32,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:32,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 23:14:32,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:32,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:32,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:32,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:47 [2021-06-05 23:14:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:14:32,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:32,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:32,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:32,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:14:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:32,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027914958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:32,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:32,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:32,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009064220] [2021-06-05 23:14:32,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:32,928 INFO L87 Difference]: Start difference. First operand 5724 states and 20714 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:33,773 INFO L93 Difference]: Finished difference Result 9332 states and 33363 transitions. [2021-06-05 23:14:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:14:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:33,788 INFO L225 Difference]: With dead ends: 9332 [2021-06-05 23:14:33,788 INFO L226 Difference]: Without dead ends: 9290 [2021-06-05 23:14:33,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 646.9ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:14:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-06-05 23:14:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 5749. [2021-06-05 23:14:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 5748 states have (on average 3.6176061238691717) internal successors, (20794), 5748 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states 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 23:14:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 20794 transitions. [2021-06-05 23:14:33,871 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 20794 transitions. Word has length 30 [2021-06-05 23:14:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:33,872 INFO L482 AbstractCegarLoop]: Abstraction has 5749 states and 20794 transitions. [2021-06-05 23:14:33,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 20794 transitions. [2021-06-05 23:14:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:33,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:33,879 INFO L554 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] [2021-06-05 23:14:34,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:34,079 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1045273622, now seen corresponding path program 51 times [2021-06-05 23:14:34,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:34,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048575292] [2021-06-05 23:14:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:34,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048575292] [2021-06-05 23:14:34,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048575292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822948301] [2021-06-05 23:14:34,307 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 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 23:14:34,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:14:34,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:34,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:34,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:34,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:34,502 INFO L446 ElimStorePlain]: Different costs {2=[v_C_93], 3=[A]} [2021-06-05 23:14:34,515 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 23:14:34,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 70 [2021-06-05 23:14:34,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,549 INFO L628 ElimStorePlain]: treesize reduction 39, result has 58.9 percent of original size [2021-06-05 23:14:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,558 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 23:14:34,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-06-05 23:14:34,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:34,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:14:34,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:42 [2021-06-05 23:14:34,642 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 23:14:34,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-06-05 23:14:34,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:34,648 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 23:14:34,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:15 [2021-06-05 23:14:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:34,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822948301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:34,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:34,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 23:14:34,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858993808] [2021-06-05 23:14:34,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:34,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:34,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:34,678 INFO L87 Difference]: Start difference. First operand 5749 states and 20794 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:35,652 INFO L93 Difference]: Finished difference Result 9027 states and 32432 transitions. [2021-06-05 23:14:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:14:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:35,668 INFO L225 Difference]: With dead ends: 9027 [2021-06-05 23:14:35,668 INFO L226 Difference]: Without dead ends: 9000 [2021-06-05 23:14:35,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:14:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-06-05 23:14:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 5757. [2021-06-05 23:14:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5757 states, 5756 states have (on average 3.6179638637943015) internal successors, (20825), 5756 states have internal predecessors, (20825), 0 states have call successors, (0), 0 states 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 23:14:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5757 states to 5757 states and 20825 transitions. [2021-06-05 23:14:35,753 INFO L78 Accepts]: Start accepts. Automaton has 5757 states and 20825 transitions. Word has length 30 [2021-06-05 23:14:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:35,753 INFO L482 AbstractCegarLoop]: Abstraction has 5757 states and 20825 transitions. [2021-06-05 23:14:35,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5757 states and 20825 transitions. [2021-06-05 23:14:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:35,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:35,760 INFO L554 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] [2021-06-05 23:14:35,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 23:14:35,961 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash 323751962, now seen corresponding path program 52 times [2021-06-05 23:14:35,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:35,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214676796] [2021-06-05 23:14:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:36,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:36,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214676796] [2021-06-05 23:14:36,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214676796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:36,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435968683] [2021-06-05 23:14:36,168 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 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 23:14:36,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:36,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:36,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:36,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:36,377 INFO L446 ElimStorePlain]: Different costs {1=[v_C_95], 5=[A]} [2021-06-05 23:14:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:36,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:14:36,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:36,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:36,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 23:14:36,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:36,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:26 [2021-06-05 23:14:36,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 23:14:36,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:36,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:36,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 23:14:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435968683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:36,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:36,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 23:14:36,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606010885] [2021-06-05 23:14:36,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:36,480 INFO L87 Difference]: Start difference. First operand 5757 states and 20825 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:38,657 INFO L93 Difference]: Finished difference Result 13617 states and 47037 transitions. [2021-06-05 23:14:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:14:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:38,680 INFO L225 Difference]: With dead ends: 13617 [2021-06-05 23:14:38,680 INFO L226 Difference]: Without dead ends: 13557 [2021-06-05 23:14:38,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1548.1ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:14:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13557 states. [2021-06-05 23:14:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13557 to 5924. [2021-06-05 23:14:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 3.6265406044234343) internal successors, (21480), 5923 states have internal predecessors, (21480), 0 states have call successors, (0), 0 states 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 23:14:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 21480 transitions. [2021-06-05 23:14:38,786 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 21480 transitions. Word has length 30 [2021-06-05 23:14:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:38,787 INFO L482 AbstractCegarLoop]: Abstraction has 5924 states and 21480 transitions. [2021-06-05 23:14:38,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 21480 transitions. [2021-06-05 23:14:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:38,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:38,794 INFO L554 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] [2021-06-05 23:14:38,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:38,994 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash 470064310, now seen corresponding path program 53 times [2021-06-05 23:14:38,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:38,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628246823] [2021-06-05 23:14:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:39,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:39,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628246823] [2021-06-05 23:14:39,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628246823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:39,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220834294] [2021-06-05 23:14:39,160 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 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 23:14:39,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:39,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:14:39,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:39,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:39,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:39,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 23:14:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:39,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:39,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:39,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:57 [2021-06-05 23:14:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:39,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-06-05 23:14:39,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:39,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 23:14:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:14:39,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:39,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:39,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:14:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220834294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:39,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:14:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451844720] [2021-06-05 23:14:39,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:14:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:14:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:14:39,497 INFO L87 Difference]: Start difference. First operand 5924 states and 21480 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:40,433 INFO L93 Difference]: Finished difference Result 10078 states and 36082 transitions. [2021-06-05 23:14:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:14:40,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:40,451 INFO L225 Difference]: With dead ends: 10078 [2021-06-05 23:14:40,451 INFO L226 Difference]: Without dead ends: 9980 [2021-06-05 23:14:40,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:14:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-06-05 23:14:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 6302. [2021-06-05 23:14:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 6301 states have (on average 3.6176797333756547) internal successors, (22795), 6301 states have internal predecessors, (22795), 0 states have call successors, (0), 0 states 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 23:14:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 22795 transitions. [2021-06-05 23:14:40,552 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 22795 transitions. Word has length 30 [2021-06-05 23:14:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:40,553 INFO L482 AbstractCegarLoop]: Abstraction has 6302 states and 22795 transitions. [2021-06-05 23:14:40,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 22795 transitions. [2021-06-05 23:14:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:40,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:40,561 INFO L554 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] [2021-06-05 23:14:40,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:40,761 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1302762992, now seen corresponding path program 54 times [2021-06-05 23:14:40,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:40,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588365029] [2021-06-05 23:14:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:40,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:40,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588365029] [2021-06-05 23:14:40,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588365029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:40,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855958104] [2021-06-05 23:14:40,946 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 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 23:14:40,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:14:40,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:40,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:40,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:40,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:40,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:41,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:41,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:53 [2021-06-05 23:14:41,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:14:41,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:41,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 23:14:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:14:41,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:41,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:41,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:14:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:41,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855958104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:41,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:41,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:41,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773393235] [2021-06-05 23:14:41,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:41,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:41,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:41,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:41,258 INFO L87 Difference]: Start difference. First operand 6302 states and 22795 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:42,278 INFO L93 Difference]: Finished difference Result 12838 states and 45680 transitions. [2021-06-05 23:14:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:14:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:42,301 INFO L225 Difference]: With dead ends: 12838 [2021-06-05 23:14:42,301 INFO L226 Difference]: Without dead ends: 12752 [2021-06-05 23:14:42,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:14:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12752 states. [2021-06-05 23:14:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12752 to 6296. [2021-06-05 23:14:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6295 states have (on average 3.6204924543288324) internal successors, (22791), 6295 states have internal predecessors, (22791), 0 states have call successors, (0), 0 states 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 23:14:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 22791 transitions. [2021-06-05 23:14:42,418 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 22791 transitions. Word has length 30 [2021-06-05 23:14:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:42,418 INFO L482 AbstractCegarLoop]: Abstraction has 6296 states and 22791 transitions. [2021-06-05 23:14:42,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 22791 transitions. [2021-06-05 23:14:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:42,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:42,427 INFO L554 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] [2021-06-05 23:14:42,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:42,629 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -950387302, now seen corresponding path program 55 times [2021-06-05 23:14:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:42,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692479152] [2021-06-05 23:14:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:42,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692479152] [2021-06-05 23:14:42,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692479152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487725694] [2021-06-05 23:14:42,793 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 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 23:14:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:42,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:42,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:42,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:42,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:42,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:42,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:53 [2021-06-05 23:14:42,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:14:42,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:42,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:34 [2021-06-05 23:14:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:14:43,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:43,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:43,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:43,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:14:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487725694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:43,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:43,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:14:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581336278] [2021-06-05 23:14:43,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:43,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:43,080 INFO L87 Difference]: Start difference. First operand 6296 states and 22791 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:44,082 INFO L93 Difference]: Finished difference Result 10684 states and 38096 transitions. [2021-06-05 23:14:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:14:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:44,099 INFO L225 Difference]: With dead ends: 10684 [2021-06-05 23:14:44,099 INFO L226 Difference]: Without dead ends: 10555 [2021-06-05 23:14:44,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:14:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10555 states. [2021-06-05 23:14:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10555 to 6248. [2021-06-05 23:14:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.6265407395549865) internal successors, (22655), 6247 states have internal predecessors, (22655), 0 states have call successors, (0), 0 states 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 23:14:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 22655 transitions. [2021-06-05 23:14:44,188 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 22655 transitions. Word has length 30 [2021-06-05 23:14:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:44,189 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 22655 transitions. [2021-06-05 23:14:44,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 22655 transitions. [2021-06-05 23:14:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:44,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:44,197 INFO L554 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] [2021-06-05 23:14:44,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:44,397 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2017761004, now seen corresponding path program 56 times [2021-06-05 23:14:44,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:44,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445799780] [2021-06-05 23:14:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:44,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:44,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445799780] [2021-06-05 23:14:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445799780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:44,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914130090] [2021-06-05 23:14:44,625 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 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 23:14:44,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:44,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:44,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:44,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:44,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:44,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:44,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:58 [2021-06-05 23:14:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 23:14:44,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:44,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 23:14:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:14:44,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:44,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:14:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:44,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914130090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:44,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:44,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 23:14:44,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686301010] [2021-06-05 23:14:44,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:44,909 INFO L87 Difference]: Start difference. First operand 6248 states and 22655 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:45,598 INFO L93 Difference]: Finished difference Result 10506 states and 37441 transitions. [2021-06-05 23:14:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:14:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:45,615 INFO L225 Difference]: With dead ends: 10506 [2021-06-05 23:14:45,616 INFO L226 Difference]: Without dead ends: 10403 [2021-06-05 23:14:45,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:14:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-06-05 23:14:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 6290. [2021-06-05 23:14:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6290 states, 6289 states have (on average 3.6283987915407856) internal successors, (22819), 6289 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states 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 23:14:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 22819 transitions. [2021-06-05 23:14:45,714 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 22819 transitions. Word has length 30 [2021-06-05 23:14:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:45,714 INFO L482 AbstractCegarLoop]: Abstraction has 6290 states and 22819 transitions. [2021-06-05 23:14:45,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 22819 transitions. [2021-06-05 23:14:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:45,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:45,722 INFO L554 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] [2021-06-05 23:14:45,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 23:14:45,923 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:45,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 663932180, now seen corresponding path program 57 times [2021-06-05 23:14:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:45,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192531947] [2021-06-05 23:14:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:46,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192531947] [2021-06-05 23:14:46,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192531947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065910852] [2021-06-05 23:14:46,047 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 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 23:14:46,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:14:46,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:46,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:46,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:46,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:46,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:46,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:46,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:46,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:14:46,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:46,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:46,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:46,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 23:14:46,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:46,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 23:14:46,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:46,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:46,279 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 23:14:46,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:74 [2021-06-05 23:14:46,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 23:14:46,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:46,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:46,404 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 23:14:46,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 23:14:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:46,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065910852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:46,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:46,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 23:14:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176455343] [2021-06-05 23:14:46,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:14:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:14:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:46,489 INFO L87 Difference]: Start difference. First operand 6290 states and 22819 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:47,434 INFO L93 Difference]: Finished difference Result 6817 states and 24383 transitions. [2021-06-05 23:14:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:14:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:47,445 INFO L225 Difference]: With dead ends: 6817 [2021-06-05 23:14:47,445 INFO L226 Difference]: Without dead ends: 6745 [2021-06-05 23:14:47,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:14:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-06-05 23:14:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6296. [2021-06-05 23:14:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6295 states have (on average 3.627164416203336) internal successors, (22833), 6295 states have internal predecessors, (22833), 0 states have call successors, (0), 0 states 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 23:14:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 22833 transitions. [2021-06-05 23:14:47,523 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 22833 transitions. Word has length 30 [2021-06-05 23:14:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:47,523 INFO L482 AbstractCegarLoop]: Abstraction has 6296 states and 22833 transitions. [2021-06-05 23:14:47,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 22833 transitions. [2021-06-05 23:14:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:47,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:47,531 INFO L554 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] [2021-06-05 23:14:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 23:14:47,732 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1055903956, now seen corresponding path program 58 times [2021-06-05 23:14:47,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:47,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193077699] [2021-06-05 23:14:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:47,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:47,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193077699] [2021-06-05 23:14:47,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193077699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:47,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372112502] [2021-06-05 23:14:47,861 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:14:47,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:47,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:47,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:47,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:47,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:47,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:48,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:14:48,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:48,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:48,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:48,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:50 [2021-06-05 23:14:48,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 23:14:48,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:48,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:48,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:48,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:36 [2021-06-05 23:14:48,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:48,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:48,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:48,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:48,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:48,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372112502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:48,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:48,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11278359] [2021-06-05 23:14:48,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:48,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:48,201 INFO L87 Difference]: Start difference. First operand 6296 states and 22833 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:48,784 INFO L93 Difference]: Finished difference Result 6888 states and 24695 transitions. [2021-06-05 23:14:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:14:48,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:48,795 INFO L225 Difference]: With dead ends: 6888 [2021-06-05 23:14:48,795 INFO L226 Difference]: Without dead ends: 6845 [2021-06-05 23:14:48,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-06-05 23:14:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6271. [2021-06-05 23:14:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 3.6299840510366828) internal successors, (22760), 6270 states have internal predecessors, (22760), 0 states have call successors, (0), 0 states 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 23:14:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 22760 transitions. [2021-06-05 23:14:48,882 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 22760 transitions. Word has length 30 [2021-06-05 23:14:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:48,882 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 22760 transitions. [2021-06-05 23:14:48,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 22760 transitions. [2021-06-05 23:14:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:48,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:48,891 INFO L554 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] [2021-06-05 23:14:49,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 23:14:49,092 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1559919772, now seen corresponding path program 59 times [2021-06-05 23:14:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:49,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418185159] [2021-06-05 23:14:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:49,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:49,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418185159] [2021-06-05 23:14:49,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418185159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:49,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586196065] [2021-06-05 23:14:49,205 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 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 23:14:49,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:49,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:49,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:14:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:49,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:49,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:49,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 23:14:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:14:49,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:49,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 23:14:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:49,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 23:14:49,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:49,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 23:14:49,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:49,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:49,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:49,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586196065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:49,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:49,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 23:14:49,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026567080] [2021-06-05 23:14:49,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:49,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:49,564 INFO L87 Difference]: Start difference. First operand 6271 states and 22760 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:50,016 INFO L93 Difference]: Finished difference Result 6494 states and 23388 transitions. [2021-06-05 23:14:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:14:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:50,027 INFO L225 Difference]: With dead ends: 6494 [2021-06-05 23:14:50,027 INFO L226 Difference]: Without dead ends: 6473 [2021-06-05 23:14:50,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-06-05 23:14:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6277. [2021-06-05 23:14:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6276 states have (on average 3.6303377947737414) internal successors, (22784), 6276 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states 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 23:14:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 22784 transitions. [2021-06-05 23:14:50,110 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 22784 transitions. Word has length 30 [2021-06-05 23:14:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:50,110 INFO L482 AbstractCegarLoop]: Abstraction has 6277 states and 22784 transitions. [2021-06-05 23:14:50,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 22784 transitions. [2021-06-05 23:14:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:50,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:50,119 INFO L554 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] [2021-06-05 23:14:50,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 23:14:50,320 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:50,320 INFO L82 PathProgramCache]: Analyzing trace with hash -144940482, now seen corresponding path program 60 times [2021-06-05 23:14:50,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:50,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443895815] [2021-06-05 23:14:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:50,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:50,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443895815] [2021-06-05 23:14:50,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443895815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:50,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191502023] [2021-06-05 23:14:50,423 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 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 23:14:50,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:14:50,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:14:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:50,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:50,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:50,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:50,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:50,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:50,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:50,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:50,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:50,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:47 [2021-06-05 23:14:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:50,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 23:14:50,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:50,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:50,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:50,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 23:14:50,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:50,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 23:14:50,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:50,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:50,727 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 23:14:50,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 23:14:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:50,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191502023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:50,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:50,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 23:14:50,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673900654] [2021-06-05 23:14:50,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:14:50,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:14:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:50,838 INFO L87 Difference]: Start difference. First operand 6277 states and 22784 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:51,791 INFO L93 Difference]: Finished difference Result 6929 states and 24693 transitions. [2021-06-05 23:14:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:14:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:51,802 INFO L225 Difference]: With dead ends: 6929 [2021-06-05 23:14:51,802 INFO L226 Difference]: Without dead ends: 6887 [2021-06-05 23:14:51,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:14:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-06-05 23:14:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6286. [2021-06-05 23:14:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6286 states, 6285 states have (on average 3.6307080350039778) internal successors, (22819), 6285 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states 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 23:14:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 22819 transitions. [2021-06-05 23:14:51,884 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 22819 transitions. Word has length 30 [2021-06-05 23:14:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:51,884 INFO L482 AbstractCegarLoop]: Abstraction has 6286 states and 22819 transitions. [2021-06-05 23:14:51,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 22819 transitions. [2021-06-05 23:14:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:51,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:51,892 INFO L554 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] [2021-06-05 23:14:52,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 23:14:52,093 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 260501498, now seen corresponding path program 61 times [2021-06-05 23:14:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:52,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499835534] [2021-06-05 23:14:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:52,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:52,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499835534] [2021-06-05 23:14:52,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499835534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:52,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976170842] [2021-06-05 23:14:52,202 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 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 23:14:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:52,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:52,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:52,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:52,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:52,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:47 [2021-06-05 23:14:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 23:14:52,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:52,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:30 [2021-06-05 23:14:52,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:52,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:52,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:52,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976170842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:52,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:52,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:52,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717925482] [2021-06-05 23:14:52,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:52,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:52,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:52,549 INFO L87 Difference]: Start difference. First operand 6286 states and 22819 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:53,032 INFO L93 Difference]: Finished difference Result 6957 states and 24946 transitions. [2021-06-05 23:14:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:14:53,033 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:53,043 INFO L225 Difference]: With dead ends: 6957 [2021-06-05 23:14:53,043 INFO L226 Difference]: Without dead ends: 6942 [2021-06-05 23:14:53,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-06-05 23:14:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6271. [2021-06-05 23:14:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 3.6299840510366828) internal successors, (22760), 6270 states have internal predecessors, (22760), 0 states have call successors, (0), 0 states 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 23:14:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 22760 transitions. [2021-06-05 23:14:53,123 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 22760 transitions. Word has length 30 [2021-06-05 23:14:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:53,123 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 22760 transitions. [2021-06-05 23:14:53,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 22760 transitions. [2021-06-05 23:14:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:53,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:53,131 INFO L554 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] [2021-06-05 23:14:53,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:53,332 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash -814318776, now seen corresponding path program 62 times [2021-06-05 23:14:53,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:53,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453795440] [2021-06-05 23:14:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:53,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453795440] [2021-06-05 23:14:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453795440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216845340] [2021-06-05 23:14:53,442 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 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 23:14:53,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:53,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:53,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:53,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:53,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:53,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:53,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:52 [2021-06-05 23:14:53,657 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-06-05 23:14:53,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 98 [2021-06-05 23:14:53,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:53,667 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 23:14:53,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:158, output treesize:36 [2021-06-05 23:14:53,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:53,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:53,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:53,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:53,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216845340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:53,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:53,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:14:53,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396756037] [2021-06-05 23:14:53,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:53,747 INFO L87 Difference]: Start difference. First operand 6271 states and 22760 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:54,455 INFO L93 Difference]: Finished difference Result 6835 states and 24442 transitions. [2021-06-05 23:14:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:14:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:54,465 INFO L225 Difference]: With dead ends: 6835 [2021-06-05 23:14:54,465 INFO L226 Difference]: Without dead ends: 6798 [2021-06-05 23:14:54,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-06-05 23:14:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6275. [2021-06-05 23:14:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 3.629901179470832) internal successors, (22774), 6274 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states 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 23:14:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 22774 transitions. [2021-06-05 23:14:54,540 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 22774 transitions. Word has length 30 [2021-06-05 23:14:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:54,541 INFO L482 AbstractCegarLoop]: Abstraction has 6275 states and 22774 transitions. [2021-06-05 23:14:54,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 22774 transitions. [2021-06-05 23:14:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:54,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:54,549 INFO L554 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] [2021-06-05 23:14:54,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:54,749 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1603347326, now seen corresponding path program 63 times [2021-06-05 23:14:54,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:54,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113457956] [2021-06-05 23:14:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:54,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:54,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113457956] [2021-06-05 23:14:54,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113457956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:54,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429890449] [2021-06-05 23:14:54,879 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 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 23:14:54,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:14:54,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:14:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:54,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:54,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:54,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:54,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:54,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:14:54,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:54,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:54,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:54,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 23:14:55,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:55,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 23:14:55,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:55,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:55,209 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 23:14:55,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:115 [2021-06-05 23:14:55,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:55,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:55,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 23:14:55,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:55,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:14:55,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:55,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:55,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:14:55,304 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:88, output treesize:52 [2021-06-05 23:14:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:55,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429890449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:55,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:55,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 23:14:55,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933144562] [2021-06-05 23:14:55,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:14:55,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:55,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:14:55,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:14:55,416 INFO L87 Difference]: Start difference. First operand 6275 states and 22774 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:56,738 INFO L93 Difference]: Finished difference Result 6597 states and 23655 transitions. [2021-06-05 23:14:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:14:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:56,750 INFO L225 Difference]: With dead ends: 6597 [2021-06-05 23:14:56,750 INFO L226 Difference]: Without dead ends: 6553 [2021-06-05 23:14:56,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:14:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2021-06-05 23:14:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 6269. [2021-06-05 23:14:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6268 states have (on average 3.629227823867262) internal successors, (22748), 6268 states have internal predecessors, (22748), 0 states have call successors, (0), 0 states 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 23:14:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 22748 transitions. [2021-06-05 23:14:56,839 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 22748 transitions. Word has length 30 [2021-06-05 23:14:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:56,839 INFO L482 AbstractCegarLoop]: Abstraction has 6269 states and 22748 transitions. [2021-06-05 23:14:56,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 22748 transitions. [2021-06-05 23:14:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:56,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:56,848 INFO L554 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] [2021-06-05 23:14:57,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 23:14:57,049 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:57,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1832361604, now seen corresponding path program 64 times [2021-06-05 23:14:57,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:57,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676583831] [2021-06-05 23:14:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676583831] [2021-06-05 23:14:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676583831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4128077] [2021-06-05 23:14:57,183 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 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 23:14:57,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:57,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:14:57,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:57,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:14:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:57,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:14:57,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:57,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:54 [2021-06-05 23:14:57,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 23:14:57,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:57,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:25 [2021-06-05 23:14:57,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:57,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:57,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:57,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4128077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:57,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:57,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 23:14:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902824790] [2021-06-05 23:14:57,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:57,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:57,507 INFO L87 Difference]: Start difference. First operand 6269 states and 22748 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:57,977 INFO L93 Difference]: Finished difference Result 6385 states and 23050 transitions. [2021-06-05 23:14:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:14:57,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:58,012 INFO L225 Difference]: With dead ends: 6385 [2021-06-05 23:14:58,013 INFO L226 Difference]: Without dead ends: 6363 [2021-06-05 23:14:58,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-06-05 23:14:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 6233. [2021-06-05 23:14:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 3.6331835686777922) internal successors, (22642), 6232 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states 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 23:14:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 22642 transitions. [2021-06-05 23:14:58,088 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 22642 transitions. Word has length 30 [2021-06-05 23:14:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:58,088 INFO L482 AbstractCegarLoop]: Abstraction has 6233 states and 22642 transitions. [2021-06-05 23:14:58,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 22642 transitions. [2021-06-05 23:14:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:58,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:58,097 INFO L554 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] [2021-06-05 23:14:58,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:58,297 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1741867956, now seen corresponding path program 65 times [2021-06-05 23:14:58,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:58,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804625108] [2021-06-05 23:14:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:58,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:58,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804625108] [2021-06-05 23:14:58,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804625108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753513227] [2021-06-05 23:14:58,420 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 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 23:14:58,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:14:58,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:58,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:58,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:14:58,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:58,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:58,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:58,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:14:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:58,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:14:58,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:58,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:58,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:58,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 23:14:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:58,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:58,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 23:14:58,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:14:58,762 INFO L628 ElimStorePlain]: treesize reduction 81, result has 50.6 percent of original size [2021-06-05 23:14:58,775 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 23:14:58,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:115 [2021-06-05 23:14:58,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:14:58,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:58,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:58,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:58,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:14:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:58,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753513227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:58,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 23:14:58,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266838832] [2021-06-05 23:14:58,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:58,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:58,891 INFO L87 Difference]: Start difference. First operand 6233 states and 22642 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:59,826 INFO L93 Difference]: Finished difference Result 6975 states and 24902 transitions. [2021-06-05 23:14:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:14:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:14:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:59,837 INFO L225 Difference]: With dead ends: 6975 [2021-06-05 23:14:59,837 INFO L226 Difference]: Without dead ends: 6924 [2021-06-05 23:14:59,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:14:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6924 states. [2021-06-05 23:14:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6924 to 6343. [2021-06-05 23:14:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 3.6255124566382846) internal successors, (22993), 6342 states have internal predecessors, (22993), 0 states have call successors, (0), 0 states 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 23:14:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 22993 transitions. [2021-06-05 23:14:59,925 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 22993 transitions. Word has length 30 [2021-06-05 23:14:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:59,925 INFO L482 AbstractCegarLoop]: Abstraction has 6343 states and 22993 transitions. [2021-06-05 23:14:59,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:14:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 22993 transitions. [2021-06-05 23:14:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:14:59,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:59,935 INFO L554 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] [2021-06-05 23:15:00,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:00,136 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1349896180, now seen corresponding path program 66 times [2021-06-05 23:15:00,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:00,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109246527] [2021-06-05 23:15:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:00,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109246527] [2021-06-05 23:15:00,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109246527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849590016] [2021-06-05 23:15:00,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:00,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:15:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:00,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:00,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:00,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:00,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:00,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:00,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:50 [2021-06-05 23:15:00,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:15:00,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:00,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 23:15:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:15:00,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:00,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:00,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:15:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:00,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849590016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:00,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:00,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:15:00,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670195305] [2021-06-05 23:15:00,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:15:00,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:15:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:15:00,537 INFO L87 Difference]: Start difference. First operand 6343 states and 22993 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:01,356 INFO L93 Difference]: Finished difference Result 7674 states and 27186 transitions. [2021-06-05 23:15:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:15:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:01,368 INFO L225 Difference]: With dead ends: 7674 [2021-06-05 23:15:01,369 INFO L226 Difference]: Without dead ends: 7631 [2021-06-05 23:15:01,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:15:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2021-06-05 23:15:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 6367. [2021-06-05 23:15:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 3.622525918944392) internal successors, (23061), 6366 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states 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 23:15:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 23061 transitions. [2021-06-05 23:15:01,452 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 23061 transitions. Word has length 30 [2021-06-05 23:15:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:01,453 INFO L482 AbstractCegarLoop]: Abstraction has 6367 states and 23061 transitions. [2021-06-05 23:15:01,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 23061 transitions. [2021-06-05 23:15:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:01,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:01,461 INFO L554 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] [2021-06-05 23:15:01,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 23:15:01,662 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1760502544, now seen corresponding path program 67 times [2021-06-05 23:15:01,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:01,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574336132] [2021-06-05 23:15:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:01,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:01,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574336132] [2021-06-05 23:15:01,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574336132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698399856] [2021-06-05 23:15:01,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:01,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:15:01,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:01,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:15:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:01,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:01,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:01,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:57 [2021-06-05 23:15:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2021-06-05 23:15:02,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:02,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:02,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:02,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:42 [2021-06-05 23:15:02,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:15:02,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:02,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:02,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:02,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:15:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:02,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698399856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:02,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:02,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:15:02,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707240115] [2021-06-05 23:15:02,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:15:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:15:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:15:02,088 INFO L87 Difference]: Start difference. First operand 6367 states and 23061 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:02,675 INFO L93 Difference]: Finished difference Result 7344 states and 26138 transitions. [2021-06-05 23:15:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:15:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:02,688 INFO L225 Difference]: With dead ends: 7344 [2021-06-05 23:15:02,688 INFO L226 Difference]: Without dead ends: 7270 [2021-06-05 23:15:02,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:15:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2021-06-05 23:15:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 6327. [2021-06-05 23:15:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6326 states have (on average 3.6296237748972495) internal successors, (22961), 6326 states have internal predecessors, (22961), 0 states have call successors, (0), 0 states 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 23:15:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 22961 transitions. [2021-06-05 23:15:02,780 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 22961 transitions. Word has length 30 [2021-06-05 23:15:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:02,780 INFO L482 AbstractCegarLoop]: Abstraction has 6327 states and 22961 transitions. [2021-06-05 23:15:02,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 22961 transitions. [2021-06-05 23:15:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:02,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:02,790 INFO L554 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] [2021-06-05 23:15:02,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 23:15:02,993 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1753454196, now seen corresponding path program 68 times [2021-06-05 23:15:02,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:02,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558477892] [2021-06-05 23:15:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:03,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558477892] [2021-06-05 23:15:03,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558477892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:03,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313957163] [2021-06-05 23:15:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:15:03,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:03,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:03,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:03,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:03,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:03,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:03,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:03,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:03,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:60 [2021-06-05 23:15:03,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 23:15:03,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:03,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 23:15:03,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:15:03,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:03,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:03,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:15:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:03,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313957163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:03,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:03,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:15:03,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874849099] [2021-06-05 23:15:03,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:15:03,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:03,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:15:03,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:15:03,461 INFO L87 Difference]: Start difference. First operand 6327 states and 22961 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:04,057 INFO L93 Difference]: Finished difference Result 7803 states and 27440 transitions. [2021-06-05 23:15:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:15:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:04,070 INFO L225 Difference]: With dead ends: 7803 [2021-06-05 23:15:04,070 INFO L226 Difference]: Without dead ends: 7700 [2021-06-05 23:15:04,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:15:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-06-05 23:15:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6339. [2021-06-05 23:15:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 6338 states have (on average 3.6345850426001896) internal successors, (23036), 6338 states have internal predecessors, (23036), 0 states have call successors, (0), 0 states 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 23:15:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 23036 transitions. [2021-06-05 23:15:04,163 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 23036 transitions. Word has length 30 [2021-06-05 23:15:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:04,163 INFO L482 AbstractCegarLoop]: Abstraction has 6339 states and 23036 transitions. [2021-06-05 23:15:04,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 23036 transitions. [2021-06-05 23:15:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:04,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:04,172 INFO L554 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] [2021-06-05 23:15:04,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 23:15:04,373 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1666844150, now seen corresponding path program 69 times [2021-06-05 23:15:04,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:04,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903334725] [2021-06-05 23:15:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:04,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903334725] [2021-06-05 23:15:04,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903334725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120167462] [2021-06-05 23:15:04,496 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 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 23:15:04,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:15:04,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:04,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:15:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:04,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:15:04,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:04,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 23:15:04,619 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 23:15:04,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:15:04,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:04,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 23:15:04,735 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:15:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-06-05 23:15:04,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:04,762 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 23:15:04,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:123 [2021-06-05 23:15:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 23:15:04,970 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:15:04,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:04,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:27 [2021-06-05 23:15:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:05,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120167462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:05,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:05,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-06-05 23:15:05,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498239292] [2021-06-05 23:15:05,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:15:05,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:15:05,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:15:05,081 INFO L87 Difference]: Start difference. First operand 6339 states and 23036 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:06,463 INFO L93 Difference]: Finished difference Result 6740 states and 24150 transitions. [2021-06-05 23:15:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:15:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:06,475 INFO L225 Difference]: With dead ends: 6740 [2021-06-05 23:15:06,475 INFO L226 Difference]: Without dead ends: 6647 [2021-06-05 23:15:06,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:15:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2021-06-05 23:15:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 6393. [2021-06-05 23:15:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 3.6307884856070087) internal successors, (23208), 6392 states have internal predecessors, (23208), 0 states have call successors, (0), 0 states 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 23:15:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 23208 transitions. [2021-06-05 23:15:06,600 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 23208 transitions. Word has length 30 [2021-06-05 23:15:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:06,600 INFO L482 AbstractCegarLoop]: Abstraction has 6393 states and 23208 transitions. [2021-06-05 23:15:06,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 23208 transitions. [2021-06-05 23:15:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:06,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:06,609 INFO L554 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] [2021-06-05 23:15:06,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:06,809 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1213143856, now seen corresponding path program 70 times [2021-06-05 23:15:06,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:06,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115424216] [2021-06-05 23:15:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:06,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:06,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115424216] [2021-06-05 23:15:06,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115424216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:06,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342368906] [2021-06-05 23:15:06,954 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:06,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:06,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:07,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:07,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:07,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:15:07,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:07,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 23:15:07,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:07,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 23:15:07,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:07,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 23:15:07,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:15:07,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:07,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:07,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:15:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:07,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342368906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:07,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:07,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:15:07,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253043000] [2021-06-05 23:15:07,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:15:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:15:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:15:07,280 INFO L87 Difference]: Start difference. First operand 6393 states and 23208 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:07,761 INFO L93 Difference]: Finished difference Result 6914 states and 24810 transitions. [2021-06-05 23:15:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:15:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:07,772 INFO L225 Difference]: With dead ends: 6914 [2021-06-05 23:15:07,772 INFO L226 Difference]: Without dead ends: 6875 [2021-06-05 23:15:07,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:15:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2021-06-05 23:15:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 6435. [2021-06-05 23:15:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 3.630711843332297) internal successors, (23360), 6434 states have internal predecessors, (23360), 0 states have call successors, (0), 0 states 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 23:15:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 23360 transitions. [2021-06-05 23:15:07,854 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 23360 transitions. Word has length 30 [2021-06-05 23:15:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:07,855 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 23360 transitions. [2021-06-05 23:15:07,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 23360 transitions. [2021-06-05 23:15:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:07,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:07,864 INFO L554 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] [2021-06-05 23:15:08,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:15:08,077 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash -821172080, now seen corresponding path program 71 times [2021-06-05 23:15:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:08,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650968863] [2021-06-05 23:15:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:08,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:08,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650968863] [2021-06-05 23:15:08,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650968863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:08,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049483623] [2021-06-05 23:15:08,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:08,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:15:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:08,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:15:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:08,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:08,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:08,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:08,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:08,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:08,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:08,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:15:08,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:08,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:08,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:15:08,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:43 [2021-06-05 23:15:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:08,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 59 [2021-06-05 23:15:08,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:15:08,524 INFO L628 ElimStorePlain]: treesize reduction 84, result has 51.2 percent of original size [2021-06-05 23:15:08,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:15:08,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:40 [2021-06-05 23:15:08,743 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2], 5=[A]} [2021-06-05 23:15:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:15:08,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:08,770 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.2 percent of original size [2021-06-05 23:15:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:08,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:08,774 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 22 treesize of output 12 [2021-06-05 23:15:08,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:08,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:08,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:15:08,784 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:20 [2021-06-05 23:15:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049483623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:08,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:08,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 23:15:08,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884871179] [2021-06-05 23:15:08,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:15:08,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:15:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:15:08,849 INFO L87 Difference]: Start difference. First operand 6435 states and 23360 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:10,975 INFO L93 Difference]: Finished difference Result 7742 states and 27559 transitions. [2021-06-05 23:15:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:15:10,976 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:10,989 INFO L225 Difference]: With dead ends: 7742 [2021-06-05 23:15:10,989 INFO L226 Difference]: Without dead ends: 7703 [2021-06-05 23:15:10,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1230.3ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:15:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2021-06-05 23:15:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 6439. [2021-06-05 23:15:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6439 states, 6438 states have (on average 3.630009319664492) internal successors, (23370), 6438 states have internal predecessors, (23370), 0 states have call successors, (0), 0 states 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 23:15:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6439 states to 6439 states and 23370 transitions. [2021-06-05 23:15:11,088 INFO L78 Accepts]: Start accepts. Automaton has 6439 states and 23370 transitions. Word has length 30 [2021-06-05 23:15:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:11,088 INFO L482 AbstractCegarLoop]: Abstraction has 6439 states and 23370 transitions. [2021-06-05 23:15:11,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6439 states and 23370 transitions. [2021-06-05 23:15:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:11,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:11,097 INFO L554 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] [2021-06-05 23:15:11,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:11,313 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1882522150, now seen corresponding path program 72 times [2021-06-05 23:15:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:11,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37124575] [2021-06-05 23:15:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:11,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:11,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37124575] [2021-06-05 23:15:11,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37124575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:11,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091517352] [2021-06-05 23:15:11,464 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:11,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:15:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:11,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:11,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:11,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:11,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:11,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:15:11,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:11,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 23:15:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 23:15:11,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:11,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:22 [2021-06-05 23:15:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 23:15:11,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:11,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:11,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:15:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:11,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091517352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:11,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:11,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:15:11,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655423784] [2021-06-05 23:15:11,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:15:11,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:11,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:15:11,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:15:11,780 INFO L87 Difference]: Start difference. First operand 6439 states and 23370 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:12,583 INFO L93 Difference]: Finished difference Result 7171 states and 25755 transitions. [2021-06-05 23:15:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:15:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:12,596 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 23:15:12,597 INFO L226 Difference]: Without dead ends: 7113 [2021-06-05 23:15:12,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:15:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-06-05 23:15:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6451. [2021-06-05 23:15:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6451 states, 6450 states have (on average 3.6308527131782946) internal successors, (23419), 6450 states have internal predecessors, (23419), 0 states have call successors, (0), 0 states 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 23:15:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6451 states to 6451 states and 23419 transitions. [2021-06-05 23:15:12,694 INFO L78 Accepts]: Start accepts. Automaton has 6451 states and 23419 transitions. Word has length 30 [2021-06-05 23:15:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:12,694 INFO L482 AbstractCegarLoop]: Abstraction has 6451 states and 23419 transitions. [2021-06-05 23:15:12,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6451 states and 23419 transitions. [2021-06-05 23:15:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:12,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:12,704 INFO L554 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] [2021-06-05 23:15:12,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 23:15:12,904 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1619848350, now seen corresponding path program 73 times [2021-06-05 23:15:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:12,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939570628] [2021-06-05 23:15:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:13,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939570628] [2021-06-05 23:15:13,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939570628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535673020] [2021-06-05 23:15:13,102 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:13,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:13,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:13,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:13,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:15:13,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:13,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 23:15:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 23:15:13,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:13,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:32 [2021-06-05 23:15:13,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 23:15:13,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:13,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 23:15:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535673020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:13,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:13,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:15:13,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47124374] [2021-06-05 23:15:13,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:15:13,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:15:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:15:13,397 INFO L87 Difference]: Start difference. First operand 6451 states and 23419 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:14,067 INFO L93 Difference]: Finished difference Result 7289 states and 26137 transitions. [2021-06-05 23:15:14,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:15:14,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:14,082 INFO L225 Difference]: With dead ends: 7289 [2021-06-05 23:15:14,082 INFO L226 Difference]: Without dead ends: 7256 [2021-06-05 23:15:14,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:15:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7256 states. [2021-06-05 23:15:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7256 to 6431. [2021-06-05 23:15:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 3.636702954898911) internal successors, (23384), 6430 states have internal predecessors, (23384), 0 states have call successors, (0), 0 states 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 23:15:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 23384 transitions. [2021-06-05 23:15:14,172 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 23384 transitions. Word has length 30 [2021-06-05 23:15:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:14,172 INFO L482 AbstractCegarLoop]: Abstraction has 6431 states and 23384 transitions. [2021-06-05 23:15:14,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 23384 transitions. [2021-06-05 23:15:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:14,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:14,182 INFO L554 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] [2021-06-05 23:15:14,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:14,383 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1131466028, now seen corresponding path program 74 times [2021-06-05 23:15:14,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:14,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495211681] [2021-06-05 23:15:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:14,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:14,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495211681] [2021-06-05 23:15:14,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495211681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:14,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615378745] [2021-06-05 23:15:14,498 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:14,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:14,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:14,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:14,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:14,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:14,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:14,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:14,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 23:15:14,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:15:14,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:14,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 23:15:14,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:15:14,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:14,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:14,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:15:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:14,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615378745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:14,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:14,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:15:14,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640891169] [2021-06-05 23:15:14,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:15:14,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:14,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:15:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:15:14,828 INFO L87 Difference]: Start difference. First operand 6431 states and 23384 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:15,771 INFO L93 Difference]: Finished difference Result 7361 states and 26202 transitions. [2021-06-05 23:15:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:15:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:15,783 INFO L225 Difference]: With dead ends: 7361 [2021-06-05 23:15:15,783 INFO L226 Difference]: Without dead ends: 7274 [2021-06-05 23:15:15,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:15:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-06-05 23:15:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6635. [2021-06-05 23:15:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 3.6323485076876696) internal successors, (24097), 6634 states have internal predecessors, (24097), 0 states have call successors, (0), 0 states 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 23:15:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 24097 transitions. [2021-06-05 23:15:15,900 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 24097 transitions. Word has length 30 [2021-06-05 23:15:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:15,900 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 24097 transitions. [2021-06-05 23:15:15,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 24097 transitions. [2021-06-05 23:15:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:15,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:15,908 INFO L554 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] [2021-06-05 23:15:16,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:16,109 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1924062824, now seen corresponding path program 75 times [2021-06-05 23:15:16,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:16,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340687157] [2021-06-05 23:15:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:16,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340687157] [2021-06-05 23:15:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340687157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110675895] [2021-06-05 23:15:16,229 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:16,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:15:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:15:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:16,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:15:16,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:16,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:15:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:16,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:16,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:49 [2021-06-05 23:15:16,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:16,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:16,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 52 [2021-06-05 23:15:16,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:15:16,512 INFO L628 ElimStorePlain]: treesize reduction 15, result has 88.5 percent of original size [2021-06-05 23:15:16,518 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 23:15:16,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:161 [2021-06-05 23:15:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 23:15:16,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:15:16,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:15:16,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:15:16,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:16,652 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.2 percent of original size [2021-06-05 23:15:16,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:15:16,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:133, output treesize:60 [2021-06-05 23:15:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:16,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110675895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:16,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:16,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 23:15:16,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607357474] [2021-06-05 23:15:16,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:15:16,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:15:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:15:16,780 INFO L87 Difference]: Start difference. First operand 6635 states and 24097 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:17,963 INFO L93 Difference]: Finished difference Result 8103 states and 28705 transitions. [2021-06-05 23:15:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:15:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:17,976 INFO L225 Difference]: With dead ends: 8103 [2021-06-05 23:15:17,977 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 23:15:17,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:15:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 23:15:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6705. [2021-06-05 23:15:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6704 states have (on average 3.6302207637231505) internal successors, (24337), 6704 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states 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 23:15:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 24337 transitions. [2021-06-05 23:15:18,069 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 24337 transitions. Word has length 30 [2021-06-05 23:15:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:18,069 INFO L482 AbstractCegarLoop]: Abstraction has 6705 states and 24337 transitions. [2021-06-05 23:15:18,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 24337 transitions. [2021-06-05 23:15:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:18,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:18,079 INFO L554 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] [2021-06-05 23:15:18,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:18,279 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:18,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1286200074, now seen corresponding path program 76 times [2021-06-05 23:15:18,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:18,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481634243] [2021-06-05 23:15:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:18,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481634243] [2021-06-05 23:15:18,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481634243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692773994] [2021-06-05 23:15:18,429 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:18,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:18,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:15:18,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:18,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 23:15:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:18,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:18,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:18,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 23:15:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-06-05 23:15:18,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:18,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 23:15:18,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:15:18,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:18,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:18,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:15:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692773994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:18,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:18,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:15:18,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971399902] [2021-06-05 23:15:18,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:15:18,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:15:18,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:15:18,750 INFO L87 Difference]: Start difference. First operand 6705 states and 24337 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:19,444 INFO L93 Difference]: Finished difference Result 6847 states and 24689 transitions. [2021-06-05 23:15:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:15:19,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:19,456 INFO L225 Difference]: With dead ends: 6847 [2021-06-05 23:15:19,456 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 23:15:19,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:15:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 23:15:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6705. [2021-06-05 23:15:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6704 states have (on average 3.6302207637231505) internal successors, (24337), 6704 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states 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 23:15:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 24337 transitions. [2021-06-05 23:15:19,547 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 24337 transitions. Word has length 30 [2021-06-05 23:15:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:19,547 INFO L482 AbstractCegarLoop]: Abstraction has 6705 states and 24337 transitions. [2021-06-05 23:15:19,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 24337 transitions. [2021-06-05 23:15:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:19,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:19,557 INFO L554 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] [2021-06-05 23:15:19,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 23:15:19,774 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1143052268, now seen corresponding path program 77 times [2021-06-05 23:15:19,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:19,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479220992] [2021-06-05 23:15:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:19,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479220992] [2021-06-05 23:15:19,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479220992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675617346] [2021-06-05 23:15:19,890 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:19,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:15:19,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:19,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:15:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:19,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:19,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:19,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:19,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:19,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:19,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:19,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:19,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:19,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 23:15:20,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:20,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 23:15:20,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:20,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:20,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:20,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 23:15:20,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:15:20,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:20,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:20,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:20,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 23:15:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675617346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:20,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:20,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:15:20,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833140806] [2021-06-05 23:15:20,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:15:20,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:20,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:15:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:15:20,233 INFO L87 Difference]: Start difference. First operand 6705 states and 24337 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:20,824 INFO L93 Difference]: Finished difference Result 7749 states and 27582 transitions. [2021-06-05 23:15:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:15:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:20,837 INFO L225 Difference]: With dead ends: 7749 [2021-06-05 23:15:20,837 INFO L226 Difference]: Without dead ends: 7683 [2021-06-05 23:15:20,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:15:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2021-06-05 23:15:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 6717. [2021-06-05 23:15:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.631923764145325) internal successors, (24392), 6716 states have internal predecessors, (24392), 0 states have call successors, (0), 0 states 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 23:15:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 24392 transitions. [2021-06-05 23:15:20,929 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 24392 transitions. Word has length 30 [2021-06-05 23:15:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:20,930 INFO L482 AbstractCegarLoop]: Abstraction has 6717 states and 24392 transitions. [2021-06-05 23:15:20,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 24392 transitions. [2021-06-05 23:15:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:15:20,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:20,939 INFO L554 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] [2021-06-05 23:15:21,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:21,139 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:21,140 INFO L82 PathProgramCache]: Analyzing trace with hash -593298096, now seen corresponding path program 78 times [2021-06-05 23:15:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:21,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684324661] [2021-06-05 23:15:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:21,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:21,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684324661] [2021-06-05 23:15:21,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684324661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:21,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990200402] [2021-06-05 23:15:21,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:21,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:15:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:15:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:21,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:21,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:21,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 23:15:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:21,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:15:21,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:21,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:49 [2021-06-05 23:15:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-06-05 23:15:21,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:21,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 23:15:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:15:21,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:21,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:21,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 23:15:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:21,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990200402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:21,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:21,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:15:21,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519491788] [2021-06-05 23:15:21,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:15:21,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:15:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:15:21,592 INFO L87 Difference]: Start difference. First operand 6717 states and 24392 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:22,602 INFO L93 Difference]: Finished difference Result 7532 states and 26962 transitions. [2021-06-05 23:15:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:15:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:15:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:22,615 INFO L225 Difference]: With dead ends: 7532 [2021-06-05 23:15:22,615 INFO L226 Difference]: Without dead ends: 7487 [2021-06-05 23:15:22,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:15:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-06-05 23:15:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 6569. [2021-06-05 23:15:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 3.6385505481120584) internal successors, (23898), 6568 states have internal predecessors, (23898), 0 states have call successors, (0), 0 states 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 23:15:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 23898 transitions. [2021-06-05 23:15:22,703 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 23898 transitions. Word has length 30 [2021-06-05 23:15:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:22,703 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 23898 transitions. [2021-06-05 23:15:22,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 23898 transitions. [2021-06-05 23:15:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:22,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:22,713 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:22,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:22,914 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:22,914 INFO L82 PathProgramCache]: Analyzing trace with hash 395652262, now seen corresponding path program 79 times [2021-06-05 23:15:22,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:22,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194236507] [2021-06-05 23:15:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:22,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:22,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194236507] [2021-06-05 23:15:22,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194236507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:22,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101417194] [2021-06-05 23:15:22,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101417194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:23,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:23,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 23:15:23,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708284556] [2021-06-05 23:15:23,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:15:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:15:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:15:23,017 INFO L87 Difference]: Start difference. First operand 6569 states and 23898 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 23:15:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:23,188 INFO L93 Difference]: Finished difference Result 11102 states and 39754 transitions. [2021-06-05 23:15:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:15:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 32 [2021-06-05 23:15:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:23,212 INFO L225 Difference]: With dead ends: 11102 [2021-06-05 23:15:23,212 INFO L226 Difference]: Without dead ends: 11102 [2021-06-05 23:15:23,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:15:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11102 states. [2021-06-05 23:15:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11102 to 6724. [2021-06-05 23:15:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 3.66517923546036) internal successors, (24641), 6723 states have internal predecessors, (24641), 0 states have call successors, (0), 0 states 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 23:15:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 24641 transitions. [2021-06-05 23:15:23,329 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 24641 transitions. Word has length 32 [2021-06-05 23:15:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:23,329 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 24641 transitions. [2021-06-05 23:15:23,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 23:15:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 24641 transitions. [2021-06-05 23:15:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:23,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:23,338 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:23,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:23,539 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1898467678, now seen corresponding path program 80 times [2021-06-05 23:15:23,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:23,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099938532] [2021-06-05 23:15:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:15:23,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:23,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099938532] [2021-06-05 23:15:23,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099938532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:23,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836047961] [2021-06-05 23:15:23,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:23,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:23,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836047961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:23,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:23,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 23:15:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658244987] [2021-06-05 23:15:23,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:15:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:15:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:15:23,651 INFO L87 Difference]: Start difference. First operand 6724 states and 24641 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:15:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:24,366 INFO L93 Difference]: Finished difference Result 16532 states and 58007 transitions. [2021-06-05 23:15:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:15:24,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:24,400 INFO L225 Difference]: With dead ends: 16532 [2021-06-05 23:15:24,400 INFO L226 Difference]: Without dead ends: 16408 [2021-06-05 23:15:24,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1582, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:15:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16408 states. [2021-06-05 23:15:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16408 to 8510. [2021-06-05 23:15:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8509 states have (on average 3.6823363497473265) internal successors, (31333), 8509 states have internal predecessors, (31333), 0 states have call successors, (0), 0 states 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 23:15:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 31333 transitions. [2021-06-05 23:15:24,589 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 31333 transitions. Word has length 32 [2021-06-05 23:15:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:24,590 INFO L482 AbstractCegarLoop]: Abstraction has 8510 states and 31333 transitions. [2021-06-05 23:15:24,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:15:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 31333 transitions. [2021-06-05 23:15:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:24,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:24,601 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:24,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:24,802 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2057537456, now seen corresponding path program 81 times [2021-06-05 23:15:24,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:24,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423738741] [2021-06-05 23:15:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:24,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:24,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423738741] [2021-06-05 23:15:24,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423738741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:24,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116816919] [2021-06-05 23:15:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:24,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:15:24,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:24,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:24,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116816919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:24,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:24,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:15:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417303348] [2021-06-05 23:15:24,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:15:24,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:15:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:15:24,913 INFO L87 Difference]: Start difference. First operand 8510 states and 31333 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:25,814 INFO L93 Difference]: Finished difference Result 20781 states and 72355 transitions. [2021-06-05 23:15:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:15:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:25,852 INFO L225 Difference]: With dead ends: 20781 [2021-06-05 23:15:25,853 INFO L226 Difference]: Without dead ends: 20533 [2021-06-05 23:15:25,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:15:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20533 states. [2021-06-05 23:15:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20533 to 11322. [2021-06-05 23:15:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.7398639696139915) internal successors, (42339), 11321 states have internal predecessors, (42339), 0 states have call successors, (0), 0 states 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 23:15:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 42339 transitions. [2021-06-05 23:15:26,084 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 42339 transitions. Word has length 32 [2021-06-05 23:15:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:26,084 INFO L482 AbstractCegarLoop]: Abstraction has 11322 states and 42339 transitions. [2021-06-05 23:15:26,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 42339 transitions. [2021-06-05 23:15:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:26,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:26,099 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 23:15:26,302 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash 64495996, now seen corresponding path program 82 times [2021-06-05 23:15:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:26,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960502213] [2021-06-05 23:15:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:15:26,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:26,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960502213] [2021-06-05 23:15:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960502213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:26,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972278463] [2021-06-05 23:15:26,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:26,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972278463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:26,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:26,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 23:15:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762374029] [2021-06-05 23:15:26,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:15:26,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:15:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:15:26,440 INFO L87 Difference]: Start difference. First operand 11322 states and 42339 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 23:15:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:27,465 INFO L93 Difference]: Finished difference Result 34302 states and 118976 transitions. [2021-06-05 23:15:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:15:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:27,536 INFO L225 Difference]: With dead ends: 34302 [2021-06-05 23:15:27,536 INFO L226 Difference]: Without dead ends: 34031 [2021-06-05 23:15:27,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 603.6ms TimeCoverageRelationStatistics Valid=1052, Invalid=3108, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:15:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34031 states. [2021-06-05 23:15:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34031 to 18468. [2021-06-05 23:15:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18468 states, 18467 states have (on average 3.7362321979747657) internal successors, (68997), 18467 states have internal predecessors, (68997), 0 states have call successors, (0), 0 states 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 23:15:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18468 states to 18468 states and 68997 transitions. [2021-06-05 23:15:27,947 INFO L78 Accepts]: Start accepts. Automaton has 18468 states and 68997 transitions. Word has length 32 [2021-06-05 23:15:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:27,947 INFO L482 AbstractCegarLoop]: Abstraction has 18468 states and 68997 transitions. [2021-06-05 23:15:27,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 23:15:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 18468 states and 68997 transitions. [2021-06-05 23:15:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:27,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:27,973 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:28,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 23:15:28,174 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:28,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1359569624, now seen corresponding path program 83 times [2021-06-05 23:15:28,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:28,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996903245] [2021-06-05 23:15:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:28,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996903245] [2021-06-05 23:15:28,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996903245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163501264] [2021-06-05 23:15:28,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:28,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:15:28,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:15:28,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:28,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163501264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:28,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:28,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2021-06-05 23:15:28,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413886781] [2021-06-05 23:15:28,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:15:28,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:15:28,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:15:28,280 INFO L87 Difference]: Start difference. First operand 18468 states and 68997 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:28,955 INFO L93 Difference]: Finished difference Result 46514 states and 167385 transitions. [2021-06-05 23:15:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:15:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:29,063 INFO L225 Difference]: With dead ends: 46514 [2021-06-05 23:15:29,064 INFO L226 Difference]: Without dead ends: 46280 [2021-06-05 23:15:29,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:15:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46280 states. [2021-06-05 23:15:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46280 to 35803. [2021-06-05 23:15:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35803 states, 35802 states have (on average 3.786240992123345) internal successors, (135555), 35802 states have internal predecessors, (135555), 0 states have call successors, (0), 0 states 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 23:15:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35803 states to 35803 states and 135555 transitions. [2021-06-05 23:15:29,826 INFO L78 Accepts]: Start accepts. Automaton has 35803 states and 135555 transitions. Word has length 32 [2021-06-05 23:15:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:29,826 INFO L482 AbstractCegarLoop]: Abstraction has 35803 states and 135555 transitions. [2021-06-05 23:15:29,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 35803 states and 135555 transitions. [2021-06-05 23:15:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:29,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:29,872 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:30,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 23:15:30,085 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash 644380696, now seen corresponding path program 84 times [2021-06-05 23:15:30,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:30,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014256724] [2021-06-05 23:15:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:30,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014256724] [2021-06-05 23:15:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014256724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447770268] [2021-06-05 23:15:30,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:30,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:15:30,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:30,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:30,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447770268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:30,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:30,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:15:30,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255433754] [2021-06-05 23:15:30,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:15:30,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:30,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:15:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:15:30,358 INFO L87 Difference]: Start difference. First operand 35803 states and 135555 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:31,877 INFO L93 Difference]: Finished difference Result 88369 states and 318216 transitions. [2021-06-05 23:15:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:15:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:32,213 INFO L225 Difference]: With dead ends: 88369 [2021-06-05 23:15:32,213 INFO L226 Difference]: Without dead ends: 88320 [2021-06-05 23:15:32,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:15:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88320 states. [2021-06-05 23:15:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88320 to 62379. [2021-06-05 23:15:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62379 states, 62378 states have (on average 3.8003462759306164) internal successors, (237058), 62378 states have internal predecessors, (237058), 0 states have call successors, (0), 0 states 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 23:15:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62379 states to 62379 states and 237058 transitions. [2021-06-05 23:15:34,085 INFO L78 Accepts]: Start accepts. Automaton has 62379 states and 237058 transitions. Word has length 32 [2021-06-05 23:15:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:34,085 INFO L482 AbstractCegarLoop]: Abstraction has 62379 states and 237058 transitions. [2021-06-05 23:15:34,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:15:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 62379 states and 237058 transitions. [2021-06-05 23:15:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:34,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:34,154 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:34,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 23:15:34,355 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:34,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1512147096, now seen corresponding path program 85 times [2021-06-05 23:15:34,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:34,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022300280] [2021-06-05 23:15:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:15:34,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022300280] [2021-06-05 23:15:34,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022300280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140069805] [2021-06-05 23:15:34,550 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:34,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:15:34,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140069805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:34,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:34,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:15:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940970067] [2021-06-05 23:15:34,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:15:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:15:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:15:34,625 INFO L87 Difference]: Start difference. First operand 62379 states and 237058 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:15:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:35,941 INFO L93 Difference]: Finished difference Result 108485 states and 398658 transitions. [2021-06-05 23:15:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:15:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:36,296 INFO L225 Difference]: With dead ends: 108485 [2021-06-05 23:15:36,297 INFO L226 Difference]: Without dead ends: 108345 [2021-06-05 23:15:36,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1437, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:15:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108345 states. [2021-06-05 23:15:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108345 to 66321. [2021-06-05 23:15:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66321 states, 66320 states have (on average 3.801809408926417) internal successors, (252136), 66320 states have internal predecessors, (252136), 0 states have call successors, (0), 0 states 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 23:15:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66321 states to 66321 states and 252136 transitions. [2021-06-05 23:15:38,275 INFO L78 Accepts]: Start accepts. Automaton has 66321 states and 252136 transitions. Word has length 32 [2021-06-05 23:15:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:38,275 INFO L482 AbstractCegarLoop]: Abstraction has 66321 states and 252136 transitions. [2021-06-05 23:15:38,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:15:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 66321 states and 252136 transitions. [2021-06-05 23:15:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:38,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:38,348 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:38,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 23:15:38,549 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash -488341172, now seen corresponding path program 86 times [2021-06-05 23:15:38,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:38,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94942690] [2021-06-05 23:15:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:38,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94942690] [2021-06-05 23:15:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94942690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663206390] [2021-06-05 23:15:38,578 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:38,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:38,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:15:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:15:38,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663206390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:38,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:38,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 23:15:38,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708540379] [2021-06-05 23:15:38,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:15:38,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:15:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:15:38,669 INFO L87 Difference]: Start difference. First operand 66321 states and 252136 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:15:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:40,622 INFO L93 Difference]: Finished difference Result 119338 states and 429533 transitions. [2021-06-05 23:15:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:15:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:40,953 INFO L225 Difference]: With dead ends: 119338 [2021-06-05 23:15:40,953 INFO L226 Difference]: Without dead ends: 119149 [2021-06-05 23:15:40,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:15:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119149 states. [2021-06-05 23:15:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119149 to 57377. [2021-06-05 23:15:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57377 states, 57376 states have (on average 3.772936419408812) internal successors, (216476), 57376 states have internal predecessors, (216476), 0 states have call successors, (0), 0 states 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 23:15:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57377 states to 57377 states and 216476 transitions. [2021-06-05 23:15:42,724 INFO L78 Accepts]: Start accepts. Automaton has 57377 states and 216476 transitions. Word has length 32 [2021-06-05 23:15:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:42,725 INFO L482 AbstractCegarLoop]: Abstraction has 57377 states and 216476 transitions. [2021-06-05 23:15:42,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 23:15:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 57377 states and 216476 transitions. [2021-06-05 23:15:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:42,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:42,778 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:42,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:42,979 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1222826244, now seen corresponding path program 87 times [2021-06-05 23:15:42,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:42,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261716466] [2021-06-05 23:15:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:43,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:43,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261716466] [2021-06-05 23:15:43,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261716466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:43,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692945985] [2021-06-05 23:15:43,014 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:43,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:15:43,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:15:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:43,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:15:43,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:43,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:43,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:43,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 23:15:43,207 INFO L446 ElimStorePlain]: Different costs {3=[v_C_149], 5=[A]} [2021-06-05 23:15:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:43,223 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-06-05 23:15:43,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 38 [2021-06-05 23:15:43,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:43,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:43,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:43,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:43,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-06-05 23:15:43,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:15:43,312 INFO L628 ElimStorePlain]: treesize reduction 90, result has 33.3 percent of original size [2021-06-05 23:15:43,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:15:43,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:45 [2021-06-05 23:15:43,492 INFO L446 ElimStorePlain]: Different costs {1=[C], 6=[v_prenex_3]} [2021-06-05 23:15:43,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:43,500 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 9 treesize of output 14 [2021-06-05 23:15:43,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:15:43,746 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 23:15:43,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:43,785 INFO L354 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 23:15:43,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 32 [2021-06-05 23:15:43,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:15:43,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:43,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:15:43,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:86, output treesize:151 [2021-06-05 23:15:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:15:44,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692945985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:44,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:44,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 21 [2021-06-05 23:15:44,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567712415] [2021-06-05 23:15:44,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:15:44,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:15:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:15:44,098 INFO L87 Difference]: Start difference. First operand 57377 states and 216476 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 23:15:44,586 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2021-06-05 23:15:45,867 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2021-06-05 23:15:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:48,004 INFO L93 Difference]: Finished difference Result 124474 states and 464024 transitions. [2021-06-05 23:15:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:15:48,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:48,370 INFO L225 Difference]: With dead ends: 124474 [2021-06-05 23:15:48,370 INFO L226 Difference]: Without dead ends: 124408 [2021-06-05 23:15:48,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2440.6ms TimeCoverageRelationStatistics Valid=664, Invalid=3368, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:15:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124408 states. [2021-06-05 23:15:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124408 to 98412. [2021-06-05 23:15:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98412 states, 98411 states have (on average 3.8090152523600005) internal successors, (374849), 98411 states have internal predecessors, (374849), 0 states have call successors, (0), 0 states 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 23:15:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98412 states to 98412 states and 374849 transitions. [2021-06-05 23:15:51,270 INFO L78 Accepts]: Start accepts. Automaton has 98412 states and 374849 transitions. Word has length 32 [2021-06-05 23:15:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:51,270 INFO L482 AbstractCegarLoop]: Abstraction has 98412 states and 374849 transitions. [2021-06-05 23:15:51,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 23:15:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 98412 states and 374849 transitions. [2021-06-05 23:15:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:51,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:51,352 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:51,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:51,553 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2035987310, now seen corresponding path program 88 times [2021-06-05 23:15:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038523956] [2021-06-05 23:15:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:51,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:51,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038523956] [2021-06-05 23:15:51,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038523956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:51,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099072635] [2021-06-05 23:15:51,583 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:51,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:51,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:51,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:15:51,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099072635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:51,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:51,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 23:15:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390853015] [2021-06-05 23:15:51,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:15:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:15:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:15:51,647 INFO L87 Difference]: Start difference. First operand 98412 states and 374849 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:52,681 INFO L93 Difference]: Finished difference Result 123934 states and 465312 transitions. [2021-06-05 23:15:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:15:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:53,037 INFO L225 Difference]: With dead ends: 123934 [2021-06-05 23:15:53,038 INFO L226 Difference]: Without dead ends: 123902 [2021-06-05 23:15:53,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:15:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123902 states. [2021-06-05 23:15:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123902 to 86419. [2021-06-05 23:15:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86419 states, 86418 states have (on average 3.807968247355875) internal successors, (329077), 86418 states have internal predecessors, (329077), 0 states have call successors, (0), 0 states 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 23:15:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86419 states to 86419 states and 329077 transitions. [2021-06-05 23:15:55,446 INFO L78 Accepts]: Start accepts. Automaton has 86419 states and 329077 transitions. Word has length 32 [2021-06-05 23:15:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:55,446 INFO L482 AbstractCegarLoop]: Abstraction has 86419 states and 329077 transitions. [2021-06-05 23:15:55,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 86419 states and 329077 transitions. [2021-06-05 23:15:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:55,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:55,514 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:55,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:55,717 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1575283700, now seen corresponding path program 89 times [2021-06-05 23:15:55,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:55,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602051502] [2021-06-05 23:15:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:55,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:55,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602051502] [2021-06-05 23:15:55,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602051502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:55,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688757111] [2021-06-05 23:15:55,746 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:55,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:15:55,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:55,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:15:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:55,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688757111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:55,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:55,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-05 23:15:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997394051] [2021-06-05 23:15:55,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:15:55,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:15:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:15:55,834 INFO L87 Difference]: Start difference. First operand 86419 states and 329077 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:56,959 INFO L93 Difference]: Finished difference Result 100765 states and 379519 transitions. [2021-06-05 23:15:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:15:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:15:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:57,274 INFO L225 Difference]: With dead ends: 100765 [2021-06-05 23:15:57,275 INFO L226 Difference]: Without dead ends: 100765 [2021-06-05 23:15:57,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:15:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100765 states. [2021-06-05 23:15:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100765 to 87208. [2021-06-05 23:15:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87208 states, 87207 states have (on average 3.801311821298749) internal successors, (331501), 87207 states have internal predecessors, (331501), 0 states have call successors, (0), 0 states 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 23:15:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87208 states to 87208 states and 331501 transitions. [2021-06-05 23:15:59,657 INFO L78 Accepts]: Start accepts. Automaton has 87208 states and 331501 transitions. Word has length 32 [2021-06-05 23:15:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:59,657 INFO L482 AbstractCegarLoop]: Abstraction has 87208 states and 331501 transitions. [2021-06-05 23:15:59,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 87208 states and 331501 transitions. [2021-06-05 23:15:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:15:59,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:59,738 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:59,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-06-05 23:15:59,938 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1114060564, now seen corresponding path program 90 times [2021-06-05 23:15:59,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:59,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777665403] [2021-06-05 23:15:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:59,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:59,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777665403] [2021-06-05 23:15:59,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777665403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:59,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915144946] [2021-06-05 23:15:59,977 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:00,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:16:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:00,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:16:00,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915144946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:00,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:00,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 23:16:00,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493958725] [2021-06-05 23:16:00,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:16:00,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:00,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:16:00,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:16:00,066 INFO L87 Difference]: Start difference. First operand 87208 states and 331501 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:16:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:01,928 INFO L93 Difference]: Finished difference Result 145992 states and 544191 transitions. [2021-06-05 23:16:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:16:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:16:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:02,825 INFO L225 Difference]: With dead ends: 145992 [2021-06-05 23:16:02,825 INFO L226 Difference]: Without dead ends: 145292 [2021-06-05 23:16:02,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 835.8ms TimeCoverageRelationStatistics Valid=849, Invalid=3441, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:16:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145292 states. [2021-06-05 23:16:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145292 to 94868. [2021-06-05 23:16:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94868 states, 94867 states have (on average 3.8163323389587527) internal successors, (362044), 94867 states have internal predecessors, (362044), 0 states have call successors, (0), 0 states 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 23:16:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94868 states to 94868 states and 362044 transitions. [2021-06-05 23:16:05,343 INFO L78 Accepts]: Start accepts. Automaton has 94868 states and 362044 transitions. Word has length 32 [2021-06-05 23:16:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:05,343 INFO L482 AbstractCegarLoop]: Abstraction has 94868 states and 362044 transitions. [2021-06-05 23:16:05,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:16:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 94868 states and 362044 transitions. [2021-06-05 23:16:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:16:05,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:05,456 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:05,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:05,672 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash 310314462, now seen corresponding path program 91 times [2021-06-05 23:16:05,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:05,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483947100] [2021-06-05 23:16:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:05,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:05,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483947100] [2021-06-05 23:16:05,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483947100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:05,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852184326] [2021-06-05 23:16:05,710 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:05,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852184326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:05,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:05,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 23:16:05,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231043475] [2021-06-05 23:16:05,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:16:05,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:05,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:16:05,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:16:05,781 INFO L87 Difference]: Start difference. First operand 94868 states and 362044 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:07,097 INFO L93 Difference]: Finished difference Result 147209 states and 562251 transitions. [2021-06-05 23:16:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:16:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:16:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:07,543 INFO L225 Difference]: With dead ends: 147209 [2021-06-05 23:16:07,543 INFO L226 Difference]: Without dead ends: 145919 [2021-06-05 23:16:07,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:16:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145919 states. [2021-06-05 23:16:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145919 to 142860. [2021-06-05 23:16:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142860 states, 142859 states have (on average 3.757474152836013) internal successors, (536789), 142859 states have internal predecessors, (536789), 0 states have call successors, (0), 0 states 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 23:16:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142860 states to 142860 states and 536789 transitions. [2021-06-05 23:16:11,229 INFO L78 Accepts]: Start accepts. Automaton has 142860 states and 536789 transitions. Word has length 33 [2021-06-05 23:16:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:11,229 INFO L482 AbstractCegarLoop]: Abstraction has 142860 states and 536789 transitions. [2021-06-05 23:16:11,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 142860 states and 536789 transitions. [2021-06-05 23:16:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:16:11,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:11,362 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:11,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 23:16:11,563 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:11,563 INFO L82 PathProgramCache]: Analyzing trace with hash 388582514, now seen corresponding path program 92 times [2021-06-05 23:16:11,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:11,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561077304] [2021-06-05 23:16:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:11,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561077304] [2021-06-05 23:16:11,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561077304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644726292] [2021-06-05 23:16:11,582 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:11,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:11,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644726292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:11,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:11,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:16:11,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764613576] [2021-06-05 23:16:11,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:16:11,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:16:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:16:11,658 INFO L87 Difference]: Start difference. First operand 142860 states and 536789 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:12,890 INFO L93 Difference]: Finished difference Result 146910 states and 548418 transitions. [2021-06-05 23:16:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:16:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:16:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:13,331 INFO L225 Difference]: With dead ends: 146910 [2021-06-05 23:16:13,331 INFO L226 Difference]: Without dead ends: 146830 [2021-06-05 23:16:13,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:16:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146830 states. [2021-06-05 23:16:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146830 to 122252. [2021-06-05 23:16:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122252 states, 122251 states have (on average 3.763003983607496) internal successors, (460031), 122251 states have internal predecessors, (460031), 0 states have call successors, (0), 0 states 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 23:16:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122252 states to 122252 states and 460031 transitions. [2021-06-05 23:16:16,793 INFO L78 Accepts]: Start accepts. Automaton has 122252 states and 460031 transitions. Word has length 33 [2021-06-05 23:16:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:16,794 INFO L482 AbstractCegarLoop]: Abstraction has 122252 states and 460031 transitions. [2021-06-05 23:16:16,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 122252 states and 460031 transitions. [2021-06-05 23:16:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:16:16,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:16,913 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:17,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 23:16:17,114 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 58068616, now seen corresponding path program 93 times [2021-06-05 23:16:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:17,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011051978] [2021-06-05 23:16:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011051978] [2021-06-05 23:16:17,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011051978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697230424] [2021-06-05 23:16:17,140 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:17,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:16:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:17,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:16:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697230424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:17,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 23:16:17,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678237910] [2021-06-05 23:16:17,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:16:17,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:17,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:16:17,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:16:17,244 INFO L87 Difference]: Start difference. First operand 122252 states and 460031 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:18,745 INFO L93 Difference]: Finished difference Result 165358 states and 606680 transitions. [2021-06-05 23:16:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:16:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:16:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:19,373 INFO L225 Difference]: With dead ends: 165358 [2021-06-05 23:16:19,373 INFO L226 Difference]: Without dead ends: 164920 [2021-06-05 23:16:19,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164920 states. [2021-06-05 23:16:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164920 to 137687. [2021-06-05 23:16:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137687 states, 137686 states have (on average 3.7301831704022197) internal successors, (513594), 137686 states have internal predecessors, (513594), 0 states have call successors, (0), 0 states 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 23:16:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137687 states to 137687 states and 513594 transitions. [2021-06-05 23:16:23,301 INFO L78 Accepts]: Start accepts. Automaton has 137687 states and 513594 transitions. Word has length 33 [2021-06-05 23:16:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:23,301 INFO L482 AbstractCegarLoop]: Abstraction has 137687 states and 513594 transitions. [2021-06-05 23:16:23,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 137687 states and 513594 transitions. [2021-06-05 23:16:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:16:23,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:23,423 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:23,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 23:16:23,623 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:23,624 INFO L82 PathProgramCache]: Analyzing trace with hash -125858070, now seen corresponding path program 94 times [2021-06-05 23:16:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:23,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325504426] [2021-06-05 23:16:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:23,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:23,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325504426] [2021-06-05 23:16:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325504426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:23,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423255187] [2021-06-05 23:16:23,643 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:23,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:23,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:23,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:16:23,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423255187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:23,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:23,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:16:23,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589706477] [2021-06-05 23:16:23,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:16:23,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:23,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:16:23,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:16:23,701 INFO L87 Difference]: Start difference. First operand 137687 states and 513594 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:24,899 INFO L93 Difference]: Finished difference Result 140839 states and 522801 transitions. [2021-06-05 23:16:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:16:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:16:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:25,301 INFO L225 Difference]: With dead ends: 140839 [2021-06-05 23:16:25,302 INFO L226 Difference]: Without dead ends: 140726 [2021-06-05 23:16:25,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:16:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140726 states. [2021-06-05 23:16:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140726 to 130600. [2021-06-05 23:16:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130600 states, 130599 states have (on average 3.7374099342261426) internal successors, (488102), 130599 states have internal predecessors, (488102), 0 states have call successors, (0), 0 states 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 23:16:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130600 states to 130600 states and 488102 transitions. [2021-06-05 23:16:28,805 INFO L78 Accepts]: Start accepts. Automaton has 130600 states and 488102 transitions. Word has length 33 [2021-06-05 23:16:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:28,805 INFO L482 AbstractCegarLoop]: Abstraction has 130600 states and 488102 transitions. [2021-06-05 23:16:28,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 130600 states and 488102 transitions. [2021-06-05 23:16:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:16:28,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:28,937 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:29,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 23:16:29,137 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash 966384908, now seen corresponding path program 95 times [2021-06-05 23:16:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:29,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39197187] [2021-06-05 23:16:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:29,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39197187] [2021-06-05 23:16:29,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39197187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872766502] [2021-06-05 23:16:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:29,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:16:29,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:16:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:16:29,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872766502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:29,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:29,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 23:16:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909230667] [2021-06-05 23:16:29,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:16:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:16:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:16:29,245 INFO L87 Difference]: Start difference. First operand 130600 states and 488102 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 23:16:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:30,823 INFO L93 Difference]: Finished difference Result 119213 states and 438130 transitions. [2021-06-05 23:16:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:16:30,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 33 [2021-06-05 23:16:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:31,146 INFO L225 Difference]: With dead ends: 119213 [2021-06-05 23:16:31,146 INFO L226 Difference]: Without dead ends: 117375 [2021-06-05 23:16:31,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=710, Invalid=2596, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:16:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117375 states. [2021-06-05 23:16:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117375 to 107160. [2021-06-05 23:16:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107160 states, 107159 states have (on average 3.7435399733106878) internal successors, (401154), 107159 states have internal predecessors, (401154), 0 states have call successors, (0), 0 states 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 23:16:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107160 states to 107160 states and 401154 transitions. [2021-06-05 23:16:33,621 INFO L78 Accepts]: Start accepts. Automaton has 107160 states and 401154 transitions. Word has length 33 [2021-06-05 23:16:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:33,621 INFO L482 AbstractCegarLoop]: Abstraction has 107160 states and 401154 transitions. [2021-06-05 23:16:33,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 23:16:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 107160 states and 401154 transitions. [2021-06-05 23:16:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:16:33,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:33,721 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:33,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:33,921 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1919330936, now seen corresponding path program 96 times [2021-06-05 23:16:33,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:33,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104246467] [2021-06-05 23:16:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:16:33,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104246467] [2021-06-05 23:16:33,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104246467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112216700] [2021-06-05 23:16:33,949 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:33,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:16:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:16:34,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112216700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:34,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:34,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 23:16:34,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840386823] [2021-06-05 23:16:34,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:16:34,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:34,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:16:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:16:34,044 INFO L87 Difference]: Start difference. First operand 107160 states and 401154 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 23:16:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:35,478 INFO L93 Difference]: Finished difference Result 117944 states and 436638 transitions. [2021-06-05 23:16:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:16:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:16:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:36,070 INFO L225 Difference]: With dead ends: 117944 [2021-06-05 23:16:36,070 INFO L226 Difference]: Without dead ends: 117764 [2021-06-05 23:16:36,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:16:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117764 states. [2021-06-05 23:16:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117764 to 113313. [2021-06-05 23:16:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113313 states, 113312 states have (on average 3.7259072295961593) internal successors, (422190), 113312 states have internal predecessors, (422190), 0 states have call successors, (0), 0 states 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 23:16:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113313 states to 113313 states and 422190 transitions. [2021-06-05 23:16:38,727 INFO L78 Accepts]: Start accepts. Automaton has 113313 states and 422190 transitions. Word has length 33 [2021-06-05 23:16:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:38,727 INFO L482 AbstractCegarLoop]: Abstraction has 113313 states and 422190 transitions. [2021-06-05 23:16:38,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 23:16:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 113313 states and 422190 transitions. [2021-06-05 23:16:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:38,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:38,846 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:39,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:39,047 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash -45752080, now seen corresponding path program 97 times [2021-06-05 23:16:39,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:39,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409170109] [2021-06-05 23:16:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:16:39,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:39,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409170109] [2021-06-05 23:16:39,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409170109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:39,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368540441] [2021-06-05 23:16:39,067 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:16:39,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368540441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:39,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:39,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:16:39,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146945528] [2021-06-05 23:16:39,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:16:39,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:16:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:16:39,135 INFO L87 Difference]: Start difference. First operand 113313 states and 422190 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:39,743 INFO L93 Difference]: Finished difference Result 127937 states and 472018 transitions. [2021-06-05 23:16:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:16:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:40,535 INFO L225 Difference]: With dead ends: 127937 [2021-06-05 23:16:40,535 INFO L226 Difference]: Without dead ends: 127901 [2021-06-05 23:16:40,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:16:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127901 states. [2021-06-05 23:16:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127901 to 121383. [2021-06-05 23:16:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121383 states, 121382 states have (on average 3.7288807236657826) internal successors, (452619), 121382 states have internal predecessors, (452619), 0 states have call successors, (0), 0 states 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 23:16:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121383 states to 121383 states and 452619 transitions. [2021-06-05 23:16:43,087 INFO L78 Accepts]: Start accepts. Automaton has 121383 states and 452619 transitions. Word has length 34 [2021-06-05 23:16:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:43,087 INFO L482 AbstractCegarLoop]: Abstraction has 121383 states and 452619 transitions. [2021-06-05 23:16:43,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 121383 states and 452619 transitions. [2021-06-05 23:16:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:16:43,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:43,208 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:43,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 23:16:43,415 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1561990614, now seen corresponding path program 98 times [2021-06-05 23:16:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:43,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774837767] [2021-06-05 23:16:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:16:43,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:43,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774837767] [2021-06-05 23:16:43,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774837767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:43,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158176273] [2021-06-05 23:16:43,440 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:43,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:16:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158176273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:43,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:43,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:16:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035858233] [2021-06-05 23:16:43,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:16:43,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:43,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:16:43,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:16:43,505 INFO L87 Difference]: Start difference. First operand 121383 states and 452619 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:44,603 INFO L93 Difference]: Finished difference Result 138778 states and 510851 transitions. [2021-06-05 23:16:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:16:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:16:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:45,005 INFO L225 Difference]: With dead ends: 138778 [2021-06-05 23:16:45,006 INFO L226 Difference]: Without dead ends: 138767 [2021-06-05 23:16:45,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:16:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138767 states. [2021-06-05 23:16:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138767 to 121225. [2021-06-05 23:16:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121225 states, 121224 states have (on average 3.728568600277173) internal successors, (451992), 121224 states have internal predecessors, (451992), 0 states have call successors, (0), 0 states 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 23:16:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121225 states to 121225 states and 451992 transitions. [2021-06-05 23:16:47,817 INFO L78 Accepts]: Start accepts. Automaton has 121225 states and 451992 transitions. Word has length 34 [2021-06-05 23:16:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:47,817 INFO L482 AbstractCegarLoop]: Abstraction has 121225 states and 451992 transitions. [2021-06-05 23:16:47,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 121225 states and 451992 transitions. [2021-06-05 23:16:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:16:47,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:47,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:48,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:48,152 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1478942404, now seen corresponding path program 99 times [2021-06-05 23:16:48,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:48,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269531319] [2021-06-05 23:16:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:16:48,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269531319] [2021-06-05 23:16:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269531319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066124682] [2021-06-05 23:16:48,178 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:48,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:16:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:16:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:16:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066124682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:48,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:48,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 23:16:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144893202] [2021-06-05 23:16:48,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:16:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:16:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:16:48,247 INFO L87 Difference]: Start difference. First operand 121225 states and 451992 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:49,323 INFO L93 Difference]: Finished difference Result 130469 states and 476570 transitions. [2021-06-05 23:16:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:16:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:16:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:49,690 INFO L225 Difference]: With dead ends: 130469 [2021-06-05 23:16:49,691 INFO L226 Difference]: Without dead ends: 130433 [2021-06-05 23:16:49,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:16:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130433 states. [2021-06-05 23:16:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130433 to 120737. [2021-06-05 23:16:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120737 states, 120736 states have (on average 3.6850483699973497) internal successors, (444918), 120736 states have internal predecessors, (444918), 0 states have call successors, (0), 0 states 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 23:16:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120737 states to 120737 states and 444918 transitions. [2021-06-05 23:16:52,558 INFO L78 Accepts]: Start accepts. Automaton has 120737 states and 444918 transitions. Word has length 35 [2021-06-05 23:16:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:52,558 INFO L482 AbstractCegarLoop]: Abstraction has 120737 states and 444918 transitions. [2021-06-05 23:16:52,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 120737 states and 444918 transitions. [2021-06-05 23:16:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:16:52,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:52,697 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:52,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:52,908 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:52,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1852449502, now seen corresponding path program 100 times [2021-06-05 23:16:52,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:52,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577722601] [2021-06-05 23:16:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:16:52,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577722601] [2021-06-05 23:16:52,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577722601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690928526] [2021-06-05 23:16:52,982 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:53,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:53,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:16:53,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:16:53,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690928526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:53,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:53,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-06-05 23:16:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851061764] [2021-06-05 23:16:53,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:16:53,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:16:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:16:53,484 INFO L87 Difference]: Start difference. First operand 120737 states and 444918 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 23:16:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:57,719 INFO L93 Difference]: Finished difference Result 330781 states and 1196551 transitions. [2021-06-05 23:16:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 23:16:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 35 [2021-06-05 23:16:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:59,202 INFO L225 Difference]: With dead ends: 330781 [2021-06-05 23:16:59,203 INFO L226 Difference]: Without dead ends: 328223 [2021-06-05 23:16:59,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 2235.1ms TimeCoverageRelationStatistics Valid=3887, Invalid=18763, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 23:16:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328223 states. [2021-06-05 23:17:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328223 to 206609. [2021-06-05 23:17:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206609 states, 206608 states have (on average 3.7288197940060406) internal successors, (770404), 206608 states have internal predecessors, (770404), 0 states have call successors, (0), 0 states 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 23:17:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206609 states to 206609 states and 770404 transitions. [2021-06-05 23:17:05,862 INFO L78 Accepts]: Start accepts. Automaton has 206609 states and 770404 transitions. Word has length 35 [2021-06-05 23:17:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:05,862 INFO L482 AbstractCegarLoop]: Abstraction has 206609 states and 770404 transitions. [2021-06-05 23:17:05,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 23:17:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 206609 states and 770404 transitions. [2021-06-05 23:17:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:17:06,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:06,044 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:06,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:06,260 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:06,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1367087600, now seen corresponding path program 101 times [2021-06-05 23:17:06,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:06,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335701925] [2021-06-05 23:17:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:17:06,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335701925] [2021-06-05 23:17:06,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335701925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621889038] [2021-06-05 23:17:06,280 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:06,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:17:06,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:06,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:17:06,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:17:06,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621889038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:06,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:06,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:17:06,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432105255] [2021-06-05 23:17:06,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:17:06,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:06,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:17:06,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:17:06,370 INFO L87 Difference]: Start difference. First operand 206609 states and 770404 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 23:17:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:08,776 INFO L93 Difference]: Finished difference Result 229213 states and 842009 transitions. [2021-06-05 23:17:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:17:08,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 35 [2021-06-05 23:17:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:09,469 INFO L225 Difference]: With dead ends: 229213 [2021-06-05 23:17:09,470 INFO L226 Difference]: Without dead ends: 228931 [2021-06-05 23:17:09,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:17:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228931 states. [2021-06-05 23:17:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228931 to 215342. [2021-06-05 23:17:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215342 states, 215341 states have (on average 3.7305204303871533) internal successors, (803334), 215341 states have internal predecessors, (803334), 0 states have call successors, (0), 0 states 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 23:17:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215342 states to 215342 states and 803334 transitions. [2021-06-05 23:17:15,298 INFO L78 Accepts]: Start accepts. Automaton has 215342 states and 803334 transitions. Word has length 35 [2021-06-05 23:17:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:15,298 INFO L482 AbstractCegarLoop]: Abstraction has 215342 states and 803334 transitions. [2021-06-05 23:17:15,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 23:17:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 215342 states and 803334 transitions. [2021-06-05 23:17:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:17:15,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:15,560 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:15,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:15,760 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:15,761 INFO L82 PathProgramCache]: Analyzing trace with hash 355190302, now seen corresponding path program 102 times [2021-06-05 23:17:15,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:15,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643178490] [2021-06-05 23:17:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:16,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:16,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643178490] [2021-06-05 23:17:16,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643178490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:16,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258942676] [2021-06-05 23:17:16,056 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:16,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:17:16,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:17:16,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:16,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:17:16,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:16,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 23:17:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:16,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 23:17:16,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:16,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:49 [2021-06-05 23:17:16,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:17:16,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:16,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 23:17:16,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:16,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:16,435 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:28 [2021-06-05 23:17:16,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 23:17:16,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:17:16,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:16,531 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 23:17:16,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:24 [2021-06-05 23:17:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258942676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:16,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:16,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 23:17:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358668075] [2021-06-05 23:17:16,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:17:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:17:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:17:16,603 INFO L87 Difference]: Start difference. First operand 215342 states and 803334 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:21,099 INFO L93 Difference]: Finished difference Result 324747 states and 1205125 transitions. [2021-06-05 23:17:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:17:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 23:17:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:22,086 INFO L225 Difference]: With dead ends: 324747 [2021-06-05 23:17:22,086 INFO L226 Difference]: Without dead ends: 324573 [2021-06-05 23:17:22,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1820.1ms TimeCoverageRelationStatistics Valid=458, Invalid=2848, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:17:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324573 states. [2021-06-05 23:17:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324573 to 215554. [2021-06-05 23:17:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215554 states, 215553 states have (on average 3.7299272104772374) internal successors, (803997), 215553 states have internal predecessors, (803997), 0 states have call successors, (0), 0 states 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 23:17:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215554 states to 215554 states and 803997 transitions. [2021-06-05 23:17:28,300 INFO L78 Accepts]: Start accepts. Automaton has 215554 states and 803997 transitions. Word has length 37 [2021-06-05 23:17:28,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:28,301 INFO L482 AbstractCegarLoop]: Abstraction has 215554 states and 803997 transitions. [2021-06-05 23:17:28,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 215554 states and 803997 transitions. [2021-06-05 23:17:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:17:28,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:28,580 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:28,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 23:17:28,780 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1235101602, now seen corresponding path program 103 times [2021-06-05 23:17:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849888026] [2021-06-05 23:17:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:29,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849888026] [2021-06-05 23:17:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849888026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910121205] [2021-06-05 23:17:29,092 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:17:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:29,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:17:29,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:29,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 23:17:29,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 23:17:29,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:29,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:56 [2021-06-05 23:17:29,448 INFO L446 ElimStorePlain]: Different costs {0=[A], 2=[v_C_155]} [2021-06-05 23:17:29,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 23:17:29,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:29,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 23:17:29,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:29,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:38 [2021-06-05 23:17:29,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 23:17:29,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:29,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:17:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:29,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910121205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:29,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:29,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2021-06-05 23:17:29,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283629176] [2021-06-05 23:17:29,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:17:29,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:29,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:17:29,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:17:29,589 INFO L87 Difference]: Start difference. First operand 215554 states and 803997 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:33,067 INFO L93 Difference]: Finished difference Result 321607 states and 1194609 transitions. [2021-06-05 23:17:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:17:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 23:17:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:34,914 INFO L225 Difference]: With dead ends: 321607 [2021-06-05 23:17:34,914 INFO L226 Difference]: Without dead ends: 321469 [2021-06-05 23:17:34,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1109.3ms TimeCoverageRelationStatistics Valid=333, Invalid=1829, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:17:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321469 states. [2021-06-05 23:17:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321469 to 215627. [2021-06-05 23:17:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215627 states, 215626 states have (on average 3.729689369556547) internal successors, (804218), 215626 states have internal predecessors, (804218), 0 states have call successors, (0), 0 states 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 23:17:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215627 states to 215627 states and 804218 transitions. [2021-06-05 23:17:41,086 INFO L78 Accepts]: Start accepts. Automaton has 215627 states and 804218 transitions. Word has length 37 [2021-06-05 23:17:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:41,086 INFO L482 AbstractCegarLoop]: Abstraction has 215627 states and 804218 transitions. [2021-06-05 23:17:41,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 215627 states and 804218 transitions. [2021-06-05 23:17:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:17:41,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:41,348 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:41,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:41,549 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash -366535714, now seen corresponding path program 104 times [2021-06-05 23:17:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:41,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752278099] [2021-06-05 23:17:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:41,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752278099] [2021-06-05 23:17:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752278099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104516183] [2021-06-05 23:17:41,861 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:41,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:41,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:17:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:42,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:17:42,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:42,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 23:17:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:42,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:17:42,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:42,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 23:17:42,213 INFO L446 ElimStorePlain]: Different costs {0=[A], 3=[v_C_158]} [2021-06-05 23:17:42,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:17:42,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:42,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2021-06-05 23:17:42,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:42,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:35 [2021-06-05 23:17:42,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 23:17:42,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:42,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 23:17:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:42,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104516183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:42,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:42,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2021-06-05 23:17:42,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347522791] [2021-06-05 23:17:42,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:17:42,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:42,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:17:42,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:17:42,322 INFO L87 Difference]: Start difference. First operand 215627 states and 804218 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:43,402 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-06-05 23:17:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:45,980 INFO L93 Difference]: Finished difference Result 320502 states and 1190679 transitions. [2021-06-05 23:17:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:17:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 23:17:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:47,007 INFO L225 Difference]: With dead ends: 320502 [2021-06-05 23:17:47,007 INFO L226 Difference]: Without dead ends: 320448 [2021-06-05 23:17:47,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1737.5ms TimeCoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:17:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320448 states. [2021-06-05 23:17:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320448 to 215755. [2021-06-05 23:17:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215755 states, 215754 states have (on average 3.7293306265469006) internal successors, (804618), 215754 states have internal predecessors, (804618), 0 states have call successors, (0), 0 states 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 23:17:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215755 states to 215755 states and 804618 transitions. [2021-06-05 23:17:52,926 INFO L78 Accepts]: Start accepts. Automaton has 215755 states and 804618 transitions. Word has length 37 [2021-06-05 23:17:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:52,926 INFO L482 AbstractCegarLoop]: Abstraction has 215755 states and 804618 transitions. [2021-06-05 23:17:52,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 215755 states and 804618 transitions. [2021-06-05 23:17:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:17:53,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:53,785 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:54,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:54,000 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1956827618, now seen corresponding path program 105 times [2021-06-05 23:17:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951725069] [2021-06-05 23:17:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:54,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:54,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951725069] [2021-06-05 23:17:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951725069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:54,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138629492] [2021-06-05 23:17:54,345 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:54,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:17:54,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:54,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:17:54,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:54,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:17:54,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:54,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:54,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:17:54,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-05 23:17:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:17:54,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:54,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:54,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:17:54,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 23:17:54,929 INFO L446 ElimStorePlain]: Different costs {3=[v_C_161], 14=[A]} [2021-06-05 23:17:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 23:17:54,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:54,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:54,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:54,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:54,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 23:17:54,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:17:54,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:54,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:54,970 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:72, output treesize:41 [2021-06-05 23:17:55,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 23:17:55,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:55,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 23:17:55,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:55,097 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.0 percent of original size [2021-06-05 23:17:55,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:17:55,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:56, output treesize:20 [2021-06-05 23:17:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:55,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138629492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:55,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:55,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 23:17:55,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415414505] [2021-06-05 23:17:55,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:17:55,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:55,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:17:55,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:17:55,179 INFO L87 Difference]: Start difference. First operand 215755 states and 804618 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:17:57,249 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 23:18:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:00,498 INFO L93 Difference]: Finished difference Result 320329 states and 1190063 transitions. [2021-06-05 23:18:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:18:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 23:18:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:01,468 INFO L225 Difference]: With dead ends: 320329 [2021-06-05 23:18:01,468 INFO L226 Difference]: Without dead ends: 320275 [2021-06-05 23:18:01,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2804.5ms TimeCoverageRelationStatistics Valid=432, Invalid=3600, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:18:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320275 states. [2021-06-05 23:18:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320275 to 215832. [2021-06-05 23:18:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215832 states, 215831 states have (on average 3.7291306624164275) internal successors, (804862), 215831 states have internal predecessors, (804862), 0 states have call successors, (0), 0 states 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 23:18:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215832 states to 215832 states and 804862 transitions. [2021-06-05 23:18:07,100 INFO L78 Accepts]: Start accepts. Automaton has 215832 states and 804862 transitions. Word has length 37 [2021-06-05 23:18:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:07,100 INFO L482 AbstractCegarLoop]: Abstraction has 215832 states and 804862 transitions. [2021-06-05 23:18:07,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:18:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 215832 states and 804862 transitions. [2021-06-05 23:18:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:18:08,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:08,023 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:08,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:08,235 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:08,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1096164250, now seen corresponding path program 106 times [2021-06-05 23:18:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:08,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651104800] [2021-06-05 23:18:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:08,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:08,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651104800] [2021-06-05 23:18:08,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651104800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:08,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486528644] [2021-06-05 23:18:08,594 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:08,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:08,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:18:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:08,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:18:08,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:08,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 23:18:08,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:08,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:18:08,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:08,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 23:18:08,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:18:08,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2021-06-05 23:18:08,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:08,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 23:18:08,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 23:18:08,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:08,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:08,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:12 [2021-06-05 23:18:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:08,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486528644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:08,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:08,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:18:08,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324226230] [2021-06-05 23:18:08,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:18:08,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:08,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:18:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:18:08,998 INFO L87 Difference]: Start difference. First operand 215832 states and 804862 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:18:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:16,040 INFO L93 Difference]: Finished difference Result 425358 states and 1539803 transitions. [2021-06-05 23:18:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:18:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 23:18:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:17,458 INFO L225 Difference]: With dead ends: 425358 [2021-06-05 23:18:17,458 INFO L226 Difference]: Without dead ends: 425220 [2021-06-05 23:18:17,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3089.1ms TimeCoverageRelationStatistics Valid=947, Invalid=6025, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:18:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425220 states. [2021-06-05 23:18:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425220 to 216458. [2021-06-05 23:18:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216458 states, 216457 states have (on average 3.727876668345214) internal successors, (806925), 216457 states have internal predecessors, (806925), 0 states have call successors, (0), 0 states 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 23:18:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216458 states to 216458 states and 806925 transitions. [2021-06-05 23:18:24,323 INFO L78 Accepts]: Start accepts. Automaton has 216458 states and 806925 transitions. Word has length 37 [2021-06-05 23:18:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:24,323 INFO L482 AbstractCegarLoop]: Abstraction has 216458 states and 806925 transitions. [2021-06-05 23:18:24,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:18:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 216458 states and 806925 transitions. [2021-06-05 23:18:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:18:24,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:24,593 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:24,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:24,794 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 964753098, now seen corresponding path program 107 times [2021-06-05 23:18:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:24,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498937376] [2021-06-05 23:18:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:25,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498937376] [2021-06-05 23:18:25,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498937376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986699630] [2021-06-05 23:18:25,146 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:25,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:18:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:18:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:25,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:18:25,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:25,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:25,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:25,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 23:18:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,373 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-06-05 23:18:25,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2021-06-05 23:18:25,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:25,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:25,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:25,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:59 [2021-06-05 23:18:25,562 INFO L446 ElimStorePlain]: Different costs {10=[v_C_167], 12=[A]} [2021-06-05 23:18:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,574 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:18:25,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2021-06-05 23:18:25,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:25,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:25,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 86 [2021-06-05 23:18:25,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:18:25,658 INFO L628 ElimStorePlain]: treesize reduction 41, result has 54.4 percent of original size [2021-06-05 23:18:25,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:18:25,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:49 [2021-06-05 23:18:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:25,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 33 treesize of output 93 [2021-06-05 23:18:26,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:18:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:26,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 23:18:26,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:26,112 INFO L628 ElimStorePlain]: treesize reduction 319, result has 13.1 percent of original size [2021-06-05 23:18:26,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:18:26,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:84, output treesize:25 [2021-06-05 23:18:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:26,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986699630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:26,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:26,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:18:26,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549910703] [2021-06-05 23:18:26,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:18:26,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:18:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:18:26,218 INFO L87 Difference]: Start difference. First operand 216458 states and 806925 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 23:18:26,686 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-06-05 23:18:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:30,745 INFO L93 Difference]: Finished difference Result 325391 states and 1207086 transitions. [2021-06-05 23:18:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:18:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 37 [2021-06-05 23:18:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:32,280 INFO L225 Difference]: With dead ends: 325391 [2021-06-05 23:18:32,280 INFO L226 Difference]: Without dead ends: 325289 [2021-06-05 23:18:32,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2475.0ms TimeCoverageRelationStatistics Valid=399, Invalid=2357, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:18:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325289 states. [2021-06-05 23:18:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325289 to 216645. [2021-06-05 23:18:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216645 states, 216644 states have (on average 3.7275484204501392) internal successors, (807551), 216644 states have internal predecessors, (807551), 0 states have call successors, (0), 0 states 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 23:18:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216645 states to 216645 states and 807551 transitions. [2021-06-05 23:18:38,760 INFO L78 Accepts]: Start accepts. Automaton has 216645 states and 807551 transitions. Word has length 37 [2021-06-05 23:18:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:38,760 INFO L482 AbstractCegarLoop]: Abstraction has 216645 states and 807551 transitions. [2021-06-05 23:18:38,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 23:18:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 216645 states and 807551 transitions. [2021-06-05 23:18:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:18:39,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:39,044 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:39,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 23:18:39,257 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash 876324308, now seen corresponding path program 108 times [2021-06-05 23:18:39,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:39,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011654165] [2021-06-05 23:18:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:39,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:39,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011654165] [2021-06-05 23:18:39,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011654165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:39,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949090573] [2021-06-05 23:18:39,631 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:39,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:18:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:39,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:18:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:18:39,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:39,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:39,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:39,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:70 [2021-06-05 23:18:39,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 23:18:39,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:39,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:39,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:39,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:60 [2021-06-05 23:18:39,939 INFO L446 ElimStorePlain]: Different costs {2=[v_C_170], 3=[A]} [2021-06-05 23:18:39,956 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-06-05 23:18:39,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 23:18:39,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:39,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:39,984 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 23:18:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-06-05 23:18:39,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:18:40,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:40,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:18:40,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:53 [2021-06-05 23:18:40,656 INFO L446 ElimStorePlain]: Different costs {2=[C], 5=[v_prenex_4]} [2021-06-05 23:18:40,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:40,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 23:18:40,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:40,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:40,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:18:40,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:18:40,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:40,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:18:40,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:94, output treesize:56 [2021-06-05 23:18:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:40,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949090573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:40,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:40,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 23:18:40,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314593056] [2021-06-05 23:18:40,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:18:40,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:40,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:18:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:18:40,896 INFO L87 Difference]: Start difference. First operand 216645 states and 807551 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:18:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:44,582 INFO L93 Difference]: Finished difference Result 323254 states and 1199966 transitions. [2021-06-05 23:18:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:18:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:18:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:46,231 INFO L225 Difference]: With dead ends: 323254 [2021-06-05 23:18:46,232 INFO L226 Difference]: Without dead ends: 323075 [2021-06-05 23:18:46,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2197.4ms TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:18:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323075 states. [2021-06-05 23:18:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323075 to 216624. [2021-06-05 23:18:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216624 states, 216623 states have (on average 3.727655881416101) internal successors, (807496), 216623 states have internal predecessors, (807496), 0 states have call successors, (0), 0 states 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 23:18:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216624 states to 216624 states and 807496 transitions. [2021-06-05 23:18:52,367 INFO L78 Accepts]: Start accepts. Automaton has 216624 states and 807496 transitions. Word has length 37 [2021-06-05 23:18:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:52,367 INFO L482 AbstractCegarLoop]: Abstraction has 216624 states and 807496 transitions. [2021-06-05 23:18:52,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:18:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 216624 states and 807496 transitions. [2021-06-05 23:18:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:18:52,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:52,622 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:52,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 23:18:52,822 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash 500337086, now seen corresponding path program 109 times [2021-06-05 23:18:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929862601] [2021-06-05 23:18:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:53,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:53,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929862601] [2021-06-05 23:18:53,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929862601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:53,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253652660] [2021-06-05 23:18:53,165 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:53,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:18:53,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:53,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:18:53,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:53,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:65 [2021-06-05 23:18:53,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 23:18:53,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:53,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:78 [2021-06-05 23:18:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 23:18:53,485 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:18:53,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:53,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-06-05 23:18:53,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:53,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:43 [2021-06-05 23:18:53,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 23:18:53,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:53,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 23:18:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:53,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253652660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:53,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:53,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:18:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278148864] [2021-06-05 23:18:53,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:18:53,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:53,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:18:53,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:18:53,603 INFO L87 Difference]: Start difference. First operand 216624 states and 807496 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:18:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:56,928 INFO L93 Difference]: Finished difference Result 322219 states and 1196250 transitions. [2021-06-05 23:18:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:18:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:18:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:57,942 INFO L225 Difference]: With dead ends: 322219 [2021-06-05 23:18:57,943 INFO L226 Difference]: Without dead ends: 322165 [2021-06-05 23:18:57,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322165 states. [2021-06-05 23:19:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322165 to 216605. [2021-06-05 23:19:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216605 states, 216604 states have (on average 3.7277935772192574) internal successors, (807455), 216604 states have internal predecessors, (807455), 0 states have call successors, (0), 0 states 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 23:19:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216605 states to 216605 states and 807455 transitions. [2021-06-05 23:19:03,580 INFO L78 Accepts]: Start accepts. Automaton has 216605 states and 807455 transitions. Word has length 37 [2021-06-05 23:19:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:03,581 INFO L482 AbstractCegarLoop]: Abstraction has 216605 states and 807455 transitions. [2021-06-05 23:19:03,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 216605 states and 807455 transitions. [2021-06-05 23:19:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:19:03,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:03,807 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:04,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 23:19:04,008 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -842986744, now seen corresponding path program 110 times [2021-06-05 23:19:04,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:04,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663156846] [2021-06-05 23:19:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:04,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663156846] [2021-06-05 23:19:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663156846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997496117] [2021-06-05 23:19:04,961 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:04,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:04,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:19:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:05,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:19:05,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:05,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 23:19:05,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:19:05,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:05,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:19:05,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:86 [2021-06-05 23:19:05,334 INFO L446 ElimStorePlain]: Different costs {3=[v_C_176], 10=[A]} [2021-06-05 23:19:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-06-05 23:19:05,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:05,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,376 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-06-05 23:19:05,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 57 [2021-06-05 23:19:05,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:05,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:100, output treesize:51 [2021-06-05 23:19:05,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-06-05 23:19:05,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:05,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:15 [2021-06-05 23:19:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997496117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:05,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:05,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:19:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544988724] [2021-06-05 23:19:05,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:19:05,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:05,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:19:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:19:05,466 INFO L87 Difference]: Start difference. First operand 216605 states and 807455 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:08,402 INFO L93 Difference]: Finished difference Result 325469 states and 1207215 transitions. [2021-06-05 23:19:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:19:08,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:19:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:09,978 INFO L225 Difference]: With dead ends: 325469 [2021-06-05 23:19:09,978 INFO L226 Difference]: Without dead ends: 325309 [2021-06-05 23:19:09,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1771.5ms TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:19:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325309 states. [2021-06-05 23:19:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325309 to 216679. [2021-06-05 23:19:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216679 states, 216678 states have (on average 3.7276096327269035) internal successors, (807691), 216678 states have internal predecessors, (807691), 0 states have call successors, (0), 0 states 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 23:19:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216679 states to 216679 states and 807691 transitions. [2021-06-05 23:19:15,856 INFO L78 Accepts]: Start accepts. Automaton has 216679 states and 807691 transitions. Word has length 37 [2021-06-05 23:19:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:15,856 INFO L482 AbstractCegarLoop]: Abstraction has 216679 states and 807691 transitions. [2021-06-05 23:19:15,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 216679 states and 807691 transitions. [2021-06-05 23:19:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:19:16,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:16,141 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:16,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 23:19:16,341 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1861688648, now seen corresponding path program 111 times [2021-06-05 23:19:16,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:16,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048090122] [2021-06-05 23:19:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:16,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048090122] [2021-06-05 23:19:16,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048090122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115267960] [2021-06-05 23:19:16,699 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:16,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:19:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:19:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:19:16,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:16,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:16,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:16,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 23:19:16,959 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 23:19:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 23:19:16,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:16,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:16,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:19:16,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:71 [2021-06-05 23:19:17,112 INFO L446 ElimStorePlain]: Different costs {3=[v_C_179], 10=[A]} [2021-06-05 23:19:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:17,125 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 23:19:17,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2021-06-05 23:19:17,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:17,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:17,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:17,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:17,177 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-06-05 23:19:17,177 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 67 [2021-06-05 23:19:17,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 23:19:17,222 INFO L628 ElimStorePlain]: treesize reduction 56, result has 54.5 percent of original size [2021-06-05 23:19:17,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:19:17,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:89, output treesize:95 [2021-06-05 23:19:17,518 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_8], 10=[C]} [2021-06-05 23:19:17,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:17,534 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 12 treesize of output 31 [2021-06-05 23:19:17,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:19:17,601 INFO L628 ElimStorePlain]: treesize reduction 31, result has 78.0 percent of original size [2021-06-05 23:19:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:17,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:17,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 94 [2021-06-05 23:19:18,083 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 145 [2021-06-05 23:19:18,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 23:19:18,935 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 82 [2021-06-05 23:19:18,936 INFO L628 ElimStorePlain]: treesize reduction 1482, result has 10.2 percent of original size [2021-06-05 23:19:18,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:19:18,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:124, output treesize:260 [2021-06-05 23:19:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:19,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115267960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:19,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:19,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 23:19:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232570947] [2021-06-05 23:19:19,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:19:19,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:19:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:19:19,124 INFO L87 Difference]: Start difference. First operand 216679 states and 807691 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:20,280 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:19:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:24,083 INFO L93 Difference]: Finished difference Result 323625 states and 1201167 transitions. [2021-06-05 23:19:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:19:24,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:19:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:25,106 INFO L225 Difference]: With dead ends: 323625 [2021-06-05 23:19:25,106 INFO L226 Difference]: Without dead ends: 323314 [2021-06-05 23:19:25,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2620.4ms TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:19:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323314 states. [2021-06-05 23:19:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323314 to 216643. [2021-06-05 23:19:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216643 states, 216642 states have (on average 3.727721309810655) internal successors, (807581), 216642 states have internal predecessors, (807581), 0 states have call successors, (0), 0 states 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 23:19:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216643 states to 216643 states and 807581 transitions. [2021-06-05 23:19:31,953 INFO L78 Accepts]: Start accepts. Automaton has 216643 states and 807581 transitions. Word has length 37 [2021-06-05 23:19:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:31,953 INFO L482 AbstractCegarLoop]: Abstraction has 216643 states and 807581 transitions. [2021-06-05 23:19:31,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 216643 states and 807581 transitions. [2021-06-05 23:19:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:19:32,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:32,221 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:32,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:32,435 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1834321192, now seen corresponding path program 112 times [2021-06-05 23:19:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:32,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32541218] [2021-06-05 23:19:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:33,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:33,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32541218] [2021-06-05 23:19:33,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32541218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:33,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32293354] [2021-06-05 23:19:33,388 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:19:33,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:19:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:19:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:19:33,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:33,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 23:19:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:33,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 23:19:33,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:33,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:71 [2021-06-05 23:19:33,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2021-06-05 23:19:33,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:33,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 23:19:33,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:33,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,924 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:37 [2021-06-05 23:19:33,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 23:19:33,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:33,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:33,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:19:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32293354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:34,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:34,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:19:34,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103822321] [2021-06-05 23:19:34,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:19:34,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:34,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:19:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:19:34,001 INFO L87 Difference]: Start difference. First operand 216643 states and 807581 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:36,714 INFO L93 Difference]: Finished difference Result 321834 states and 1194937 transitions. [2021-06-05 23:19:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:19:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:19:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:38,274 INFO L225 Difference]: With dead ends: 321834 [2021-06-05 23:19:38,274 INFO L226 Difference]: Without dead ends: 321686 [2021-06-05 23:19:38,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1612.1ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:19:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321686 states. [2021-06-05 23:19:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321686 to 216659. [2021-06-05 23:19:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216659 states, 216658 states have (on average 3.7276814149489055) internal successors, (807632), 216658 states have internal predecessors, (807632), 0 states have call successors, (0), 0 states 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 23:19:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216659 states to 216659 states and 807632 transitions. [2021-06-05 23:19:44,196 INFO L78 Accepts]: Start accepts. Automaton has 216659 states and 807632 transitions. Word has length 37 [2021-06-05 23:19:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:44,196 INFO L482 AbstractCegarLoop]: Abstraction has 216659 states and 807632 transitions. [2021-06-05 23:19:44,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:19:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 216659 states and 807632 transitions. [2021-06-05 23:19:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:19:44,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:44,506 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:44,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:44,721 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1284650824, now seen corresponding path program 113 times [2021-06-05 23:19:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:44,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367964471] [2021-06-05 23:19:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:45,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:45,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367964471] [2021-06-05 23:19:45,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367964471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:45,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875678323] [2021-06-05 23:19:45,048 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:45,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:19:45,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:19:45,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:45,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:19:45,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:45,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:45,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:45,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 23:19:45,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,281 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:19:45,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 23:19:45,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:45,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:45,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:45,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 23:19:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,425 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 23:19:45,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-06-05 23:19:45,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:45,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:45,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:19:45,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:72 [2021-06-05 23:19:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:45,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 96 [2021-06-05 23:19:45,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:19:45,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:45,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:19:45,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:48 [2021-06-05 23:19:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:45,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:45,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:45,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-06-05 23:19:45,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:45,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:45,712 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 23:19:45,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:12 [2021-06-05 23:19:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:45,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875678323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:45,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:45,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:19:45,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817062853] [2021-06-05 23:19:45,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:19:45,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:45,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:19:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:19:45,751 INFO L87 Difference]: Start difference. First operand 216659 states and 807632 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 23:19:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:49,255 INFO L93 Difference]: Finished difference Result 320671 states and 1191422 transitions. [2021-06-05 23:19:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:19:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 37 [2021-06-05 23:19:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:50,373 INFO L225 Difference]: With dead ends: 320671 [2021-06-05 23:19:50,373 INFO L226 Difference]: Without dead ends: 320650 [2021-06-05 23:19:50,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:19:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320650 states. [2021-06-05 23:19:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320650 to 216671. [2021-06-05 23:19:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216671 states, 216670 states have (on average 3.727650343840864) internal successors, (807670), 216670 states have internal predecessors, (807670), 0 states have call successors, (0), 0 states 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 23:19:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216671 states to 216671 states and 807670 transitions. [2021-06-05 23:19:56,353 INFO L78 Accepts]: Start accepts. Automaton has 216671 states and 807670 transitions. Word has length 37 [2021-06-05 23:19:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:56,353 INFO L482 AbstractCegarLoop]: Abstraction has 216671 states and 807670 transitions. [2021-06-05 23:19:56,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 23:19:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 216671 states and 807670 transitions. [2021-06-05 23:19:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:19:56,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:56,587 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:56,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:56,787 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:56,788 INFO L82 PathProgramCache]: Analyzing trace with hash -488176478, now seen corresponding path program 114 times [2021-06-05 23:19:56,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:56,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071688060] [2021-06-05 23:19:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:57,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:57,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071688060] [2021-06-05 23:19:57,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071688060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:57,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230462352] [2021-06-05 23:19:57,118 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:57,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:19:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:19:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:19:57,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:57,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-06-05 23:19:57,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:19:57,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:57,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:74 [2021-06-05 23:19:57,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:57,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2021-06-05 23:19:57,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:57,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:89 [2021-06-05 23:19:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:57,454 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 53 treesize of output 41 [2021-06-05 23:19:57,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:57,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:53 [2021-06-05 23:19:57,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 23:19:57,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:57,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:57,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:17 [2021-06-05 23:19:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:19:58,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230462352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:58,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:58,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:19:58,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151976649] [2021-06-05 23:19:58,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:19:58,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:58,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:19:58,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:19:58,048 INFO L87 Difference]: Start difference. First operand 216671 states and 807670 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:20:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:01,787 INFO L93 Difference]: Finished difference Result 380615 states and 1412256 transitions. [2021-06-05 23:20:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:20:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:20:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:03,617 INFO L225 Difference]: With dead ends: 380615 [2021-06-05 23:20:03,617 INFO L226 Difference]: Without dead ends: 380587 [2021-06-05 23:20:03,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1411.0ms TimeCoverageRelationStatistics Valid=287, Invalid=1969, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:20:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380587 states. [2021-06-05 23:20:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380587 to 216720. [2021-06-05 23:20:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216720 states, 216719 states have (on average 3.7275550367065184) internal successors, (807832), 216719 states have internal predecessors, (807832), 0 states have call successors, (0), 0 states 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 23:20:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216720 states to 216720 states and 807832 transitions. [2021-06-05 23:20:10,121 INFO L78 Accepts]: Start accepts. Automaton has 216720 states and 807832 transitions. Word has length 37 [2021-06-05 23:20:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:10,121 INFO L482 AbstractCegarLoop]: Abstraction has 216720 states and 807832 transitions. [2021-06-05 23:20:10,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:20:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 216720 states and 807832 transitions. [2021-06-05 23:20:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:20:10,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:10,374 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:10,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:10,574 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:10,575 INFO L82 PathProgramCache]: Analyzing trace with hash -135800788, now seen corresponding path program 115 times [2021-06-05 23:20:10,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:10,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630757093] [2021-06-05 23:20:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:11,360 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-05 23:20:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:11,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630757093] [2021-06-05 23:20:11,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630757093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859813170] [2021-06-05 23:20:11,578 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:20:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:11,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:20:11,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:11,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 23:20:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:11,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 23:20:11,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:11,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:77 [2021-06-05 23:20:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:11,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:11,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-06-05 23:20:11,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:11,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:89 [2021-06-05 23:20:11,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2021-06-05 23:20:11,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:11,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:36 [2021-06-05 23:20:11,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 23:20:11,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:11,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:11,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:20:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:12,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859813170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:12,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:12,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:20:12,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944350547] [2021-06-05 23:20:12,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:20:12,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:12,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:20:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:20:12,029 INFO L87 Difference]: Start difference. First operand 216720 states and 807832 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:20:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:14,846 INFO L93 Difference]: Finished difference Result 322034 states and 1195739 transitions. [2021-06-05 23:20:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:20:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:20:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:16,427 INFO L225 Difference]: With dead ends: 322034 [2021-06-05 23:20:16,427 INFO L226 Difference]: Without dead ends: 321959 [2021-06-05 23:20:16,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1522.6ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:20:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321959 states. [2021-06-05 23:20:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321959 to 216732. [2021-06-05 23:20:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216732 states, 216731 states have (on average 3.727496297253277) internal successors, (807864), 216731 states have internal predecessors, (807864), 0 states have call successors, (0), 0 states 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 23:20:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216732 states to 216732 states and 807864 transitions. [2021-06-05 23:20:22,981 INFO L78 Accepts]: Start accepts. Automaton has 216732 states and 807864 transitions. Word has length 37 [2021-06-05 23:20:22,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:22,981 INFO L482 AbstractCegarLoop]: Abstraction has 216732 states and 807864 transitions. [2021-06-05 23:20:22,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:20:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 216732 states and 807864 transitions. [2021-06-05 23:20:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:20:23,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:23,504 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:23,721 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -674408686, now seen corresponding path program 116 times [2021-06-05 23:20:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991953774] [2021-06-05 23:20:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:24,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:24,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991953774] [2021-06-05 23:20:24,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991953774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:24,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604183109] [2021-06-05 23:20:24,077 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:24,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:20:24,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:20:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 23:20:24,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:24,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 23:20:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:20:24,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:24,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:77 [2021-06-05 23:20:24,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 39 [2021-06-05 23:20:24,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 34 [2021-06-05 23:20:24,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:24,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,497 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:47 [2021-06-05 23:20:24,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 23:20:24,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:24,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:24,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 23:20:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:24,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604183109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:24,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:24,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:20:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393840234] [2021-06-05 23:20:24,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:20:24,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:24,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:20:24,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:20:24,571 INFO L87 Difference]: Start difference. First operand 216732 states and 807864 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:20:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:27,167 INFO L93 Difference]: Finished difference Result 322027 states and 1195511 transitions. [2021-06-05 23:20:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:20:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 23:20:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:28,792 INFO L225 Difference]: With dead ends: 322027 [2021-06-05 23:20:28,793 INFO L226 Difference]: Without dead ends: 321867 [2021-06-05 23:20:28,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 874.6ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:20:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321867 states. [2021-06-05 23:20:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321867 to 216769. [2021-06-05 23:20:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216769 states, 216768 states have (on average 3.727395187481547) internal successors, (807980), 216768 states have internal predecessors, (807980), 0 states have call successors, (0), 0 states 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 23:20:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216769 states to 216769 states and 807980 transitions. [2021-06-05 23:20:34,812 INFO L78 Accepts]: Start accepts. Automaton has 216769 states and 807980 transitions. Word has length 37 [2021-06-05 23:20:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:34,812 INFO L482 AbstractCegarLoop]: Abstraction has 216769 states and 807980 transitions. [2021-06-05 23:20:34,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 23:20:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 216769 states and 807980 transitions. [2021-06-05 23:20:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:20:35,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:35,070 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:35,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:35,270 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2042746648, now seen corresponding path program 117 times [2021-06-05 23:20:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:35,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753789071] [2021-06-05 23:20:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:35,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:35,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753789071] [2021-06-05 23:20:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753789071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:35,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114675555] [2021-06-05 23:20:35,691 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:35,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:20:35,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:20:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:35,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 23:20:35,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:35,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:35,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:35,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 23:20:35,869 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-06-05 23:20:35,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 23:20:35,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:35,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:35,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:35,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-06-05 23:20:36,077 INFO L446 ElimStorePlain]: Different costs {3=[v_C_197], 7=[A]} [2021-06-05 23:20:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,089 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 23:20:36,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-06-05 23:20:36,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:36,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,135 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:20:36,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2021-06-05 23:20:36,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:36,172 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 23:20:36,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:20:36,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:61 [2021-06-05 23:20:36,461 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_11]} [2021-06-05 23:20:36,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:36,479 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 12 treesize of output 31 [2021-06-05 23:20:36,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:20:36,561 INFO L628 ElimStorePlain]: treesize reduction 15, result has 88.2 percent of original size [2021-06-05 23:20:36,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:36,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 45 treesize of output 93 [2021-06-05 23:20:37,061 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 96