/usr/bin/java -Xmx8000000000 -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-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:28:09,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:28:09,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:28:09,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:28:09,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 21:28:09,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 21:28:09,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 21:28:09,560 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 [2021-06-12 21:28:09,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:28:09,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:28:09,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:28:09,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:28:09,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:28:09,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:28:09,589 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:28:09,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:28:09,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:28:09,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:28:09,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:28:09,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:28:09,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:28:09,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:28:09,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:28:09,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:28:09,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:28:09,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:28:09,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:28:09,853 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:28:09,854 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:28:09,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-06-12 21:28:09,865 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-06-12 21:28:09,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:28:09,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:28:09,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:28:09,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:28:09,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:28:09,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:28:09,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:28:09,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:28:09,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:28:09,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/1) ... [2021-06-12 21:28:09,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:28:09,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:28:09,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:28:09,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:28:09,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (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 [2021-06-12 21:28:10,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:28:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:28:10,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:28:10,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:28:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:28:10,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:28:10,045 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:28:10,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:28:10,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:28:10,045 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:28:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:28:10,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:28:10,046 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 21:28:10,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 21:28:10,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 21:28:10,047 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:28:10,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:28:10,271 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:28:10,272 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:28:10 BoogieIcfgContainer [2021-06-12 21:28:10,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:28:10,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:28:10,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:28:10,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:28:10,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:28:09" (1/2) ... [2021-06-12 21:28:10,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662f3e30 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:28:10, skipping insertion in model container [2021-06-12 21:28:10,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:28:10" (2/2) ... [2021-06-12 21:28:10,277 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-06-12 21:28:10,281 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:28:10,281 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:28:10,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:28:10,281 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:28:10,360 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 21:28:10,377 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-12 21:28:10,393 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:28:10,394 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:28:10,394 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:28:10,394 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:28:10,394 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:28:10,394 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:28:10,394 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:28:10,394 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:28:10,411 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-12 21:28:10,457 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:28:10,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:10,479 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:10,479 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1014933584, now seen corresponding path program 1 times [2021-06-12 21:28:10,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:10,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216501463] [2021-06-12 21:28:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:10,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216501463] [2021-06-12 21:28:10,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216501463] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:28:10,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:28:10,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:28:10,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933149283] [2021-06-12 21:28:10,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:28:10,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:28:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:28:10,608 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) 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) [2021-06-12 21:28:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:10,658 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2021-06-12 21:28:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:28:10,659 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 [2021-06-12 21:28:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:10,677 INFO L225 Difference]: With dead ends: 691 [2021-06-12 21:28:10,677 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 21:28:10,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:28:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 21:28:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-06-12 21:28:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-06-12 21:28:10,755 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-06-12 21:28:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:10,755 INFO L482 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-06-12 21:28:10,755 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) [2021-06-12 21:28:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-06-12 21:28:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:28:10,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:10,758 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:10,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:28:10,759 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:10,759 INFO L82 PathProgramCache]: Analyzing trace with hash 810519764, now seen corresponding path program 1 times [2021-06-12 21:28:10,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:10,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558774704] [2021-06-12 21:28:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:10,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:10,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558774704] [2021-06-12 21:28:10,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558774704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:10,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773619178] [2021-06-12 21:28:10,803 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 [2021-06-12 21:28:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:10,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 21:28:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:10,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773619178] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:28:10,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 21:28:10,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-12 21:28:10,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634923212] [2021-06-12 21:28:10,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:28:10,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:28:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:28:10,931 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:10,957 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2021-06-12 21:28:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:28:10,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:28:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:10,964 INFO L225 Difference]: With dead ends: 1250 [2021-06-12 21:28:10,965 INFO L226 Difference]: Without dead ends: 1250 [2021-06-12 21:28:10,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:28:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-12 21:28:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-06-12 21:28:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-06-12 21:28:10,992 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-06-12 21:28:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:10,992 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-06-12 21:28:10,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-06-12 21:28:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:28:10,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:10,995 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:11,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 21:28:11,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash 234896854, now seen corresponding path program 1 times [2021-06-12 21:28:11,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:11,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676310767] [2021-06-12 21:28:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:11,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:11,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676310767] [2021-06-12 21:28:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676310767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:11,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473124501] [2021-06-12 21:28:11,339 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 [2021-06-12 21:28:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:28:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:28:11,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:11,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:11,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:11,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:28:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:11,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473124501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:11,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:11,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-12 21:28:11,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731581764] [2021-06-12 21:28:11,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:28:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:28:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:28:11,521 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:11,597 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2021-06-12 21:28:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:28:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:28:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:11,606 INFO L225 Difference]: With dead ends: 1934 [2021-06-12 21:28:11,606 INFO L226 Difference]: Without dead ends: 1807 [2021-06-12 21:28:11,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:28:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-12 21:28:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-06-12 21:28:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-06-12 21:28:11,646 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-06-12 21:28:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:11,646 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-06-12 21:28:11,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-06-12 21:28:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:28:11,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:11,650 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:11,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:11,865 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1112061528, now seen corresponding path program 2 times [2021-06-12 21:28:11,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:11,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819440453] [2021-06-12 21:28:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:11,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:11,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819440453] [2021-06-12 21:28:11,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819440453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:11,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142514590] [2021-06-12 21:28:11,904 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 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 [2021-06-12 21:28:11,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:28:11,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:11,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:28:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142514590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:12,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:12,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-12 21:28:12,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392268021] [2021-06-12 21:28:12,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:28:12,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:12,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:28:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:28:12,049 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 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) [2021-06-12 21:28:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:12,113 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2021-06-12 21:28:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:28:12,113 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 26 [2021-06-12 21:28:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:12,125 INFO L225 Difference]: With dead ends: 2404 [2021-06-12 21:28:12,125 INFO L226 Difference]: Without dead ends: 2234 [2021-06-12 21:28:12,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:28:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-06-12 21:28:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-06-12 21:28:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-06-12 21:28:12,185 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-06-12 21:28:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:12,186 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-06-12 21:28:12,186 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) [2021-06-12 21:28:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-06-12 21:28:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:28:12,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:12,192 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:12,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:12,409 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:12,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1469512084, now seen corresponding path program 1 times [2021-06-12 21:28:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:12,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258270856] [2021-06-12 21:28:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:28:12,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258270856] [2021-06-12 21:28:12,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258270856] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:28:12,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:28:12,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:28:12,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076572487] [2021-06-12 21:28:12,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:28:12,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:28:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:28:12,468 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:12,501 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2021-06-12 21:28:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:28:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:12,517 INFO L225 Difference]: With dead ends: 3426 [2021-06-12 21:28:12,517 INFO L226 Difference]: Without dead ends: 3255 [2021-06-12 21:28:12,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:28:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-06-12 21:28:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-06-12 21:28:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-06-12 21:28:12,610 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-06-12 21:28:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:12,610 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-06-12 21:28:12,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-06-12 21:28:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:28:12,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:12,616 INFO L472 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, 1] [2021-06-12 21:28:12,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 21:28:12,617 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1414582092, now seen corresponding path program 3 times [2021-06-12 21:28:12,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:12,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224382794] [2021-06-12 21:28:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:12,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:12,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224382794] [2021-06-12 21:28:12,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224382794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:12,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522083815] [2021-06-12 21:28:12,679 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 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 [2021-06-12 21:28:12,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:28:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:28:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:12,845 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:28:12,845 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 28 treesize of output 12 [2021-06-12 21:28:12,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:12,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:12,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:12,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:3 [2021-06-12 21:28:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522083815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:12,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:12,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 21:28:12,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036290234] [2021-06-12 21:28:12,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:28:12,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:12,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:28:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:28:12,874 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:13,265 INFO L93 Difference]: Finished difference Result 7730 states and 29466 transitions. [2021-06-12 21:28:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:28:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:28:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:13,305 INFO L225 Difference]: With dead ends: 7730 [2021-06-12 21:28:13,305 INFO L226 Difference]: Without dead ends: 7083 [2021-06-12 21:28:13,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:28:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-06-12 21:28:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2938. [2021-06-12 21:28:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-06-12 21:28:13,442 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-06-12 21:28:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:13,442 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-06-12 21:28:13,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-06-12 21:28:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:28:13,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:13,451 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:13,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:13,668 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash -690178897, now seen corresponding path program 1 times [2021-06-12 21:28:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:13,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103302812] [2021-06-12 21:28:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:28:13,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:13,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103302812] [2021-06-12 21:28:13,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103302812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:28:13,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:28:13,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:28:13,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408843473] [2021-06-12 21:28:13,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:28:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:28:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:28:13,704 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:13,724 INFO L93 Difference]: Finished difference Result 2938 states and 11171 transitions. [2021-06-12 21:28:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:28:13,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:28:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:13,734 INFO L225 Difference]: With dead ends: 2938 [2021-06-12 21:28:13,734 INFO L226 Difference]: Without dead ends: 2938 [2021-06-12 21:28:13,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:28:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-06-12 21:28:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-06-12 21:28:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.8035410282601294) internal successors, (11171), 2937 states have internal predecessors, (11171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11171 transitions. [2021-06-12 21:28:13,862 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11171 transitions. Word has length 29 [2021-06-12 21:28:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:13,863 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 11171 transitions. [2021-06-12 21:28:13,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11171 transitions. [2021-06-12 21:28:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:28:13,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:13,873 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:13,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 21:28:13,873 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 866424555, now seen corresponding path program 2 times [2021-06-12 21:28:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:13,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317455504] [2021-06-12 21:28:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:28:13,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:13,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317455504] [2021-06-12 21:28:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317455504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:13,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053871551] [2021-06-12 21:28:13,910 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 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 [2021-06-12 21:28:13,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:28:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:28:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:28:14,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053871551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:14,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:14,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-12 21:28:14,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700437829] [2021-06-12 21:28:14,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:28:14,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:28:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:28:14,053 INFO L87 Difference]: Start difference. First operand 2938 states and 11171 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-06-12 21:28:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:14,298 INFO L93 Difference]: Finished difference Result 9089 states and 33364 transitions. [2021-06-12 21:28:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:28:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2021-06-12 21:28:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:14,321 INFO L225 Difference]: With dead ends: 9089 [2021-06-12 21:28:14,321 INFO L226 Difference]: Without dead ends: 9039 [2021-06-12 21:28:14,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-06-12 21:28:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 3700. [2021-06-12 21:28:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.9689105163557716) internal successors, (14681), 3699 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 14681 transitions. [2021-06-12 21:28:14,438 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 14681 transitions. Word has length 29 [2021-06-12 21:28:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:14,438 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 14681 transitions. [2021-06-12 21:28:14,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-06-12 21:28:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 14681 transitions. [2021-06-12 21:28:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:28:14,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:14,446 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:14,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:14,685 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash -595430549, now seen corresponding path program 3 times [2021-06-12 21:28:14,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:14,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429055532] [2021-06-12 21:28:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:28:14,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:14,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429055532] [2021-06-12 21:28:14,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429055532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:14,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794836523] [2021-06-12 21:28:14,711 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 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 [2021-06-12 21:28:14,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:28:14,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:28:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:28:14,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794836523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:14,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:14,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-12 21:28:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474368127] [2021-06-12 21:28:14,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:28:14,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:28:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:28:14,811 INFO L87 Difference]: Start difference. First operand 3700 states and 14681 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-06-12 21:28:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:15,006 INFO L93 Difference]: Finished difference Result 8113 states and 29971 transitions. [2021-06-12 21:28:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:28:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 29 [2021-06-12 21:28:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:15,027 INFO L225 Difference]: With dead ends: 8113 [2021-06-12 21:28:15,027 INFO L226 Difference]: Without dead ends: 8113 [2021-06-12 21:28:15,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8113 states. [2021-06-12 21:28:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8113 to 3985. [2021-06-12 21:28:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3984 states have (on average 3.9485441767068274) internal successors, (15731), 3984 states have internal predecessors, (15731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 15731 transitions. [2021-06-12 21:28:15,165 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 15731 transitions. Word has length 29 [2021-06-12 21:28:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:15,165 INFO L482 AbstractCegarLoop]: Abstraction has 3985 states and 15731 transitions. [2021-06-12 21:28:15,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-06-12 21:28:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 15731 transitions. [2021-06-12 21:28:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:28:15,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:15,175 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:15,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:15,389 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash 805726646, now seen corresponding path program 4 times [2021-06-12 21:28:15,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:15,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120025930] [2021-06-12 21:28:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:15,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:15,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120025930] [2021-06-12 21:28:15,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120025930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:15,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027733000] [2021-06-12 21:28:15,436 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:28:15,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:28:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:28:15,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:15,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027733000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:15,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:15,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-12 21:28:15,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242509902] [2021-06-12 21:28:15,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:28:15,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:28:15,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:28:15,538 INFO L87 Difference]: Start difference. First operand 3985 states and 15731 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:15,619 INFO L93 Difference]: Finished difference Result 7893 states and 31090 transitions. [2021-06-12 21:28:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:28:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:28:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:15,642 INFO L225 Difference]: With dead ends: 7893 [2021-06-12 21:28:15,642 INFO L226 Difference]: Without dead ends: 7621 [2021-06-12 21:28:15,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:28:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2021-06-12 21:28:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 6363. [2021-06-12 21:28:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6363 states, 6362 states have (on average 4.042125117887457) internal successors, (25716), 6362 states have internal predecessors, (25716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6363 states to 6363 states and 25716 transitions. [2021-06-12 21:28:15,837 INFO L78 Accepts]: Start accepts. Automaton has 6363 states and 25716 transitions. Word has length 31 [2021-06-12 21:28:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:15,837 INFO L482 AbstractCegarLoop]: Abstraction has 6363 states and 25716 transitions. [2021-06-12 21:28:15,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6363 states and 25716 transitions. [2021-06-12 21:28:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:28:15,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:15,857 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:16,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 21:28:16,074 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1071796465, now seen corresponding path program 4 times [2021-06-12 21:28:16,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:16,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118899958] [2021-06-12 21:28:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:28:16,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:16,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118899958] [2021-06-12 21:28:16,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118899958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:16,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15919] [2021-06-12 21:28:16,095 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:16,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:28:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:28:16,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:28:16,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:16,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:16,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 21:28:16,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781151796] [2021-06-12 21:28:16,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:28:16,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:28:16,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:28:16,184 INFO L87 Difference]: Start difference. First operand 6363 states and 25716 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:16,230 INFO L93 Difference]: Finished difference Result 7990 states and 31805 transitions. [2021-06-12 21:28:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:28:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:28:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:16,255 INFO L225 Difference]: With dead ends: 7990 [2021-06-12 21:28:16,256 INFO L226 Difference]: Without dead ends: 7990 [2021-06-12 21:28:16,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:28:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-12 21:28:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6023. [2021-06-12 21:28:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 6022 states have (on average 3.988542012620392) internal successors, (24019), 6022 states have internal predecessors, (24019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 24019 transitions. [2021-06-12 21:28:16,380 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 24019 transitions. Word has length 32 [2021-06-12 21:28:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:16,380 INFO L482 AbstractCegarLoop]: Abstraction has 6023 states and 24019 transitions. [2021-06-12 21:28:16,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 24019 transitions. [2021-06-12 21:28:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:16,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:16,395 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:16,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 21:28:16,596 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:16,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2103834406, now seen corresponding path program 5 times [2021-06-12 21:28:16,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:16,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117907175] [2021-06-12 21:28:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:16,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:16,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117907175] [2021-06-12 21:28:16,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117907175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554180212] [2021-06-12 21:28:16,678 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 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 [2021-06-12 21:28:16,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:28:16,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:28:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:16,953 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:28:16,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 21:28:16,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:16,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:16,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:16,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:3 [2021-06-12 21:28:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:16,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554180212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:16,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:16,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 21:28:16,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452481419] [2021-06-12 21:28:16,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:16,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:16,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:16,990 INFO L87 Difference]: Start difference. First operand 6023 states and 24019 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:17,454 INFO L93 Difference]: Finished difference Result 14134 states and 55947 transitions. [2021-06-12 21:28:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:28:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:17,489 INFO L225 Difference]: With dead ends: 14134 [2021-06-12 21:28:17,489 INFO L226 Difference]: Without dead ends: 13721 [2021-06-12 21:28:17,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:28:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13721 states. [2021-06-12 21:28:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13721 to 6348. [2021-06-12 21:28:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6347 states have (on average 4.00330864975579) internal successors, (25409), 6347 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 25409 transitions. [2021-06-12 21:28:17,733 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 25409 transitions. Word has length 34 [2021-06-12 21:28:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:17,733 INFO L482 AbstractCegarLoop]: Abstraction has 6348 states and 25409 transitions. [2021-06-12 21:28:17,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 25409 transitions. [2021-06-12 21:28:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:17,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:17,746 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:17,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:17,961 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 616045325, now seen corresponding path program 5 times [2021-06-12 21:28:17,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:17,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164255313] [2021-06-12 21:28:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:18,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164255313] [2021-06-12 21:28:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164255313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376559152] [2021-06-12 21:28:18,046 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 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 [2021-06-12 21:28:18,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:28:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:18,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:28:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:18,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:18,236 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 22 treesize of output 40 [2021-06-12 21:28:18,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:28:18,296 INFO L628 ElimStorePlain]: treesize reduction 16, result has 66.7 percent of original size [2021-06-12 21:28:18,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:18,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:28 [2021-06-12 21:28:18,394 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 27 treesize of output 21 [2021-06-12 21:28:18,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:18,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:18,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:18,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:28:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:18,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376559152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:18,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:18,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:18,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020302450] [2021-06-12 21:28:18,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:18,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:18,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:18,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:18,416 INFO L87 Difference]: Start difference. First operand 6348 states and 25409 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:19,340 INFO L93 Difference]: Finished difference Result 17828 states and 69084 transitions. [2021-06-12 21:28:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:28:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-06-12 21:28:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:19,383 INFO L225 Difference]: With dead ends: 17828 [2021-06-12 21:28:19,383 INFO L226 Difference]: Without dead ends: 17753 [2021-06-12 21:28:19,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 578.7ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:28:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17753 states. [2021-06-12 21:28:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17753 to 7658. [2021-06-12 21:28:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.0185451221104875) internal successors, (30770), 7657 states have internal predecessors, (30770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 30770 transitions. [2021-06-12 21:28:19,684 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 30770 transitions. Word has length 34 [2021-06-12 21:28:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:19,684 INFO L482 AbstractCegarLoop]: Abstraction has 7658 states and 30770 transitions. [2021-06-12 21:28:19,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 30770 transitions. [2021-06-12 21:28:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:19,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:19,700 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:19,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:19,919 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash -158773189, now seen corresponding path program 6 times [2021-06-12 21:28:19,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:19,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131900338] [2021-06-12 21:28:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:20,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131900338] [2021-06-12 21:28:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131900338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514569069] [2021-06-12 21:28:20,000 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 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 [2021-06-12 21:28:20,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:28:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:28:20,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:20,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:20,181 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 42 treesize of output 54 [2021-06-12 21:28:20,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:28:20,236 INFO L628 ElimStorePlain]: treesize reduction 30, result has 54.5 percent of original size [2021-06-12 21:28:20,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:20,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:30 [2021-06-12 21:28:20,320 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 27 treesize of output 21 [2021-06-12 21:28:20,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:20,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:20,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:20,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:28:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:20,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514569069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:20,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:20,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:20,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529704458] [2021-06-12 21:28:20,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:20,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:20,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:20,343 INFO L87 Difference]: Start difference. First operand 7658 states and 30770 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:21,318 INFO L93 Difference]: Finished difference Result 26431 states and 104477 transitions. [2021-06-12 21:28:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:28:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-06-12 21:28:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:21,387 INFO L225 Difference]: With dead ends: 26431 [2021-06-12 21:28:21,387 INFO L226 Difference]: Without dead ends: 26356 [2021-06-12 21:28:21,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:28:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26356 states. [2021-06-12 21:28:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26356 to 8714. [2021-06-12 21:28:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 4.058188913118329) internal successors, (35359), 8713 states have internal predecessors, (35359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 35359 transitions. [2021-06-12 21:28:21,755 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 35359 transitions. Word has length 34 [2021-06-12 21:28:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:21,755 INFO L482 AbstractCegarLoop]: Abstraction has 8714 states and 35359 transitions. [2021-06-12 21:28:21,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 35359 transitions. [2021-06-12 21:28:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:21,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:21,771 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:21,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:28:21,987 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash -824736107, now seen corresponding path program 7 times [2021-06-12 21:28:21,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:21,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738228140] [2021-06-12 21:28:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:22,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:22,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738228140] [2021-06-12 21:28:22,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738228140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:22,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5531596] [2021-06-12 21:28:22,069 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 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 [2021-06-12 21:28:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:22,291 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 32 treesize of output 26 [2021-06-12 21:28:22,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:22,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:22,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:22,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-06-12 21:28:22,325 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:22,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:22,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:22,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:22,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:22,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:22,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5531596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:22,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:22,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744018310] [2021-06-12 21:28:22,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:22,349 INFO L87 Difference]: Start difference. First operand 8714 states and 35359 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:22,913 INFO L93 Difference]: Finished difference Result 19981 states and 79468 transitions. [2021-06-12 21:28:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:28:22,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:22,963 INFO L225 Difference]: With dead ends: 19981 [2021-06-12 21:28:22,963 INFO L226 Difference]: Without dead ends: 19826 [2021-06-12 21:28:22,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:28:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19826 states. [2021-06-12 21:28:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19826 to 8750. [2021-06-12 21:28:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 4.062750028574694) internal successors, (35545), 8749 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 35545 transitions. [2021-06-12 21:28:23,231 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 35545 transitions. Word has length 34 [2021-06-12 21:28:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:23,231 INFO L482 AbstractCegarLoop]: Abstraction has 8750 states and 35545 transitions. [2021-06-12 21:28:23,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 35545 transitions. [2021-06-12 21:28:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:23,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:23,251 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:23,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:23,465 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1500154431, now seen corresponding path program 8 times [2021-06-12 21:28:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:23,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887526867] [2021-06-12 21:28:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:23,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:23,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887526867] [2021-06-12 21:28:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887526867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:23,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974397009] [2021-06-12 21:28:23,532 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:23,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:28:23,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:23,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:23,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:23,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:23,690 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 44 treesize of output 26 [2021-06-12 21:28:23,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:23,698 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-12 21:28:23,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:23,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-12 21:28:23,830 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 15 treesize of output 11 [2021-06-12 21:28:23,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:23,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:23,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:23,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-12 21:28:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:23,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974397009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:23,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:23,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:23,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370170599] [2021-06-12 21:28:23,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:23,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:23,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:23,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:23,850 INFO L87 Difference]: Start difference. First operand 8750 states and 35545 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) [2021-06-12 21:28:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:24,459 INFO L93 Difference]: Finished difference Result 24924 states and 99773 transitions. [2021-06-12 21:28:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:28:24,460 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 34 [2021-06-12 21:28:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:24,525 INFO L225 Difference]: With dead ends: 24924 [2021-06-12 21:28:24,525 INFO L226 Difference]: Without dead ends: 24849 [2021-06-12 21:28:24,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:28:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24849 states. [2021-06-12 21:28:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24849 to 10107. [2021-06-12 21:28:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10106 states have (on average 4.0783692855729266) internal successors, (41216), 10106 states have internal predecessors, (41216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 41216 transitions. [2021-06-12 21:28:24,859 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 41216 transitions. Word has length 34 [2021-06-12 21:28:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:24,860 INFO L482 AbstractCegarLoop]: Abstraction has 10107 states and 41216 transitions. [2021-06-12 21:28:24,860 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) [2021-06-12 21:28:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 41216 transitions. [2021-06-12 21:28:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:24,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:24,876 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:25,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 21:28:25,077 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 834191513, now seen corresponding path program 9 times [2021-06-12 21:28:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432634719] [2021-06-12 21:28:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:25,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432634719] [2021-06-12 21:28:25,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432634719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813817351] [2021-06-12 21:28:25,151 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 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 [2021-06-12 21:28:25,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:28:25,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:28:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:25,321 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 32 treesize of output 26 [2021-06-12 21:28:25,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:25,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:25,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:25,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-06-12 21:28:25,353 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:28:25,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:28:25,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:25,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:25,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:25,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-12 21:28:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:25,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813817351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:25,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:25,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:25,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829523499] [2021-06-12 21:28:25,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:25,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:25,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:25,383 INFO L87 Difference]: Start difference. First operand 10107 states and 41216 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:25,887 INFO L93 Difference]: Finished difference Result 23710 states and 94971 transitions. [2021-06-12 21:28:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:28:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:26,033 INFO L225 Difference]: With dead ends: 23710 [2021-06-12 21:28:26,033 INFO L226 Difference]: Without dead ends: 23595 [2021-06-12 21:28:26,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:28:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23595 states. [2021-06-12 21:28:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23595 to 9723. [2021-06-12 21:28:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9723 states, 9722 states have (on average 4.074675992594116) internal successors, (39614), 9722 states have internal predecessors, (39614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 39614 transitions. [2021-06-12 21:28:26,362 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 39614 transitions. Word has length 34 [2021-06-12 21:28:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:26,362 INFO L482 AbstractCegarLoop]: Abstraction has 9723 states and 39614 transitions. [2021-06-12 21:28:26,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 39614 transitions. [2021-06-12 21:28:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:26,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:26,382 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:26,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:26,591 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1500178855, now seen corresponding path program 10 times [2021-06-12 21:28:26,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:26,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457419481] [2021-06-12 21:28:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:26,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:26,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457419481] [2021-06-12 21:28:26,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457419481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:26,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495832067] [2021-06-12 21:28:26,673 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 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 [2021-06-12 21:28:26,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:28:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:26,810 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 26 treesize of output 20 [2021-06-12 21:28:26,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:26,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:26,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:26,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-06-12 21:28:26,861 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:26,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:26,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:26,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:26,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:26,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:26,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495832067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:26,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:26,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:26,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475964136] [2021-06-12 21:28:26,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:26,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:26,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:26,890 INFO L87 Difference]: Start difference. First operand 9723 states and 39614 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:27,430 INFO L93 Difference]: Finished difference Result 22988 states and 91824 transitions. [2021-06-12 21:28:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:28:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:27,488 INFO L225 Difference]: With dead ends: 22988 [2021-06-12 21:28:27,489 INFO L226 Difference]: Without dead ends: 22753 [2021-06-12 21:28:27,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:28:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22753 states. [2021-06-12 21:28:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22753 to 9831. [2021-06-12 21:28:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9831 states, 9830 states have (on average 4.077110885045778) internal successors, (40078), 9830 states have internal predecessors, (40078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9831 states to 9831 states and 40078 transitions. [2021-06-12 21:28:27,832 INFO L78 Accepts]: Start accepts. Automaton has 9831 states and 40078 transitions. Word has length 34 [2021-06-12 21:28:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:27,832 INFO L482 AbstractCegarLoop]: Abstraction has 9831 states and 40078 transitions. [2021-06-12 21:28:27,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9831 states and 40078 transitions. [2021-06-12 21:28:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:27,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:27,849 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:28,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 21:28:28,065 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash -573433369, now seen corresponding path program 11 times [2021-06-12 21:28:28,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:28,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499779215] [2021-06-12 21:28:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:28,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:28,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499779215] [2021-06-12 21:28:28,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499779215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:28,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946899492] [2021-06-12 21:28:28,186 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 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 [2021-06-12 21:28:28,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:28:28,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:28:28,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:28,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:28,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2021-06-12 21:28:28,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:28:28,377 INFO L628 ElimStorePlain]: treesize reduction 22, result has 56.9 percent of original size [2021-06-12 21:28:28,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:28,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:28 [2021-06-12 21:28:28,442 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 15 treesize of output 11 [2021-06-12 21:28:28,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:28,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:28,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:28,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-12 21:28:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:28,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946899492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:28,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:28,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542034784] [2021-06-12 21:28:28,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:28,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:28,464 INFO L87 Difference]: Start difference. First operand 9831 states and 40078 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:28,722 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-06-12 21:28:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:29,703 INFO L93 Difference]: Finished difference Result 26430 states and 105005 transitions. [2021-06-12 21:28:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:28:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-06-12 21:28:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:29,779 INFO L225 Difference]: With dead ends: 26430 [2021-06-12 21:28:29,780 INFO L226 Difference]: Without dead ends: 26355 [2021-06-12 21:28:29,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 845.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:28:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26355 states. [2021-06-12 21:28:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26355 to 10895. [2021-06-12 21:28:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10895 states, 10894 states have (on average 4.096016155682027) internal successors, (44622), 10894 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10895 states to 10895 states and 44622 transitions. [2021-06-12 21:28:30,144 INFO L78 Accepts]: Start accepts. Automaton has 10895 states and 44622 transitions. Word has length 34 [2021-06-12 21:28:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:30,144 INFO L482 AbstractCegarLoop]: Abstraction has 10895 states and 44622 transitions. [2021-06-12 21:28:30,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:30,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10895 states and 44622 transitions. [2021-06-12 21:28:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:30,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:30,163 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:30,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:30,377 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:30,377 INFO L82 PathProgramCache]: Analyzing trace with hash -316777907, now seen corresponding path program 12 times [2021-06-12 21:28:30,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:30,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995622065] [2021-06-12 21:28:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995622065] [2021-06-12 21:28:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995622065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212868124] [2021-06-12 21:28:30,475 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 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 [2021-06-12 21:28:30,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:28:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:28:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:30,753 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 28 treesize of output 22 [2021-06-12 21:28:30,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:30,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:30,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:28:30,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:36 [2021-06-12 21:28:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:30,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:30,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 21:28:30,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:30,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:30,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:30,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:13 [2021-06-12 21:28:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212868124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:30,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:30,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:30,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130757808] [2021-06-12 21:28:30,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:30,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:30,875 INFO L87 Difference]: Start difference. First operand 10895 states and 44622 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:31,902 INFO L93 Difference]: Finished difference Result 28412 states and 113321 transitions. [2021-06-12 21:28:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:28:31,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:31,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:31,981 INFO L225 Difference]: With dead ends: 28412 [2021-06-12 21:28:31,981 INFO L226 Difference]: Without dead ends: 28297 [2021-06-12 21:28:31,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:28:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28297 states. [2021-06-12 21:28:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28297 to 10659. [2021-06-12 21:28:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 4.094952148620754) internal successors, (43644), 10658 states have internal predecessors, (43644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 43644 transitions. [2021-06-12 21:28:32,422 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 43644 transitions. Word has length 34 [2021-06-12 21:28:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:32,422 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 43644 transitions. [2021-06-12 21:28:32,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 43644 transitions. [2021-06-12 21:28:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:32,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:32,439 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:32,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:28:32,650 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1202868029, now seen corresponding path program 13 times [2021-06-12 21:28:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:32,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224153896] [2021-06-12 21:28:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:32,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:32,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224153896] [2021-06-12 21:28:32,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224153896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:32,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447039980] [2021-06-12 21:28:32,765 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 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 [2021-06-12 21:28:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:32,892 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 19 treesize of output 15 [2021-06-12 21:28:32,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:32,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:32,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:32,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-06-12 21:28:32,935 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:32,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:32,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:32,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:32,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:32,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:32,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447039980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:32,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:32,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:32,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354587436] [2021-06-12 21:28:32,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:32,963 INFO L87 Difference]: Start difference. First operand 10659 states and 43644 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:33,261 INFO L93 Difference]: Finished difference Result 19194 states and 76806 transitions. [2021-06-12 21:28:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:28:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:33,305 INFO L225 Difference]: With dead ends: 19194 [2021-06-12 21:28:33,305 INFO L226 Difference]: Without dead ends: 19079 [2021-06-12 21:28:33,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:28:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19079 states. [2021-06-12 21:28:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19079 to 10744. [2021-06-12 21:28:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 4.095783300753979) internal successors, (44001), 10743 states have internal predecessors, (44001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 44001 transitions. [2021-06-12 21:28:33,660 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 44001 transitions. Word has length 34 [2021-06-12 21:28:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:33,660 INFO L482 AbstractCegarLoop]: Abstraction has 10744 states and 44001 transitions. [2021-06-12 21:28:33,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 44001 transitions. [2021-06-12 21:28:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:33,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:33,685 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:33,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 21:28:33,887 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash 431927787, now seen corresponding path program 14 times [2021-06-12 21:28:33,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:33,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405615070] [2021-06-12 21:28:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:33,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:33,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405615070] [2021-06-12 21:28:33,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405615070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:33,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013870944] [2021-06-12 21:28:33,974 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 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 [2021-06-12 21:28:34,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:28:34,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:34,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:34,120 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 44 treesize of output 26 [2021-06-12 21:28:34,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:34,127 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-12 21:28:34,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:34,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-12 21:28:34,158 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 15 treesize of output 11 [2021-06-12 21:28:34,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:34,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:34,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:34,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-12 21:28:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:34,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013870944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:34,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:34,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:34,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288865125] [2021-06-12 21:28:34,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:34,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:34,177 INFO L87 Difference]: Start difference. First operand 10744 states and 44001 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) [2021-06-12 21:28:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:35,081 INFO L93 Difference]: Finished difference Result 24998 states and 100164 transitions. [2021-06-12 21:28:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:28:35,081 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 34 [2021-06-12 21:28:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:35,139 INFO L225 Difference]: With dead ends: 24998 [2021-06-12 21:28:35,139 INFO L226 Difference]: Without dead ends: 24923 [2021-06-12 21:28:35,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:28:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2021-06-12 21:28:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 11500. [2021-06-12 21:28:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11500 states, 11499 states have (on average 4.106009218192886) internal successors, (47215), 11499 states have internal predecessors, (47215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11500 states to 11500 states and 47215 transitions. [2021-06-12 21:28:35,396 INFO L78 Accepts]: Start accepts. Automaton has 11500 states and 47215 transitions. Word has length 34 [2021-06-12 21:28:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:35,396 INFO L482 AbstractCegarLoop]: Abstraction has 11500 states and 47215 transitions. [2021-06-12 21:28:35,396 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) [2021-06-12 21:28:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 11500 states and 47215 transitions. [2021-06-12 21:28:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:35,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:35,414 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:35,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 21:28:35,615 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash 688583249, now seen corresponding path program 15 times [2021-06-12 21:28:35,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:35,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053647124] [2021-06-12 21:28:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:35,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:35,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053647124] [2021-06-12 21:28:35,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053647124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:35,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984252653] [2021-06-12 21:28:35,699 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 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 [2021-06-12 21:28:35,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:28:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:28:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:35,843 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 34 treesize of output 28 [2021-06-12 21:28:35,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:35,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:35,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:35,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-06-12 21:28:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:35,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:35,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 37 [2021-06-12 21:28:35,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:35,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:35,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:35,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-06-12 21:28:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:35,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984252653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:35,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:35,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:35,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25329242] [2021-06-12 21:28:35,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:35,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:35,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:35,946 INFO L87 Difference]: Start difference. First operand 11500 states and 47215 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:37,061 INFO L93 Difference]: Finished difference Result 23541 states and 94127 transitions. [2021-06-12 21:28:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:28:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:37,119 INFO L225 Difference]: With dead ends: 23541 [2021-06-12 21:28:37,119 INFO L226 Difference]: Without dead ends: 23426 [2021-06-12 21:28:37,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:28:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23426 states. [2021-06-12 21:28:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23426 to 11260. [2021-06-12 21:28:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 4.104893862687628) internal successors, (46217), 11259 states have internal predecessors, (46217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 46217 transitions. [2021-06-12 21:28:37,388 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 46217 transitions. Word has length 34 [2021-06-12 21:28:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:37,388 INFO L482 AbstractCegarLoop]: Abstraction has 11260 states and 46217 transitions. [2021-06-12 21:28:37,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 46217 transitions. [2021-06-12 21:28:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:37,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:37,406 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:37,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 21:28:37,607 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:37,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2086738111, now seen corresponding path program 16 times [2021-06-12 21:28:37,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:37,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651702199] [2021-06-12 21:28:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:37,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651702199] [2021-06-12 21:28:37,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651702199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494089644] [2021-06-12 21:28:37,692 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 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 [2021-06-12 21:28:37,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:28:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:37,798 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 19 treesize of output 15 [2021-06-12 21:28:37,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:37,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:37,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:37,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-06-12 21:28:37,840 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:37,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:37,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:37,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:37,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:37,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494089644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:37,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:37,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349317261] [2021-06-12 21:28:37,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:37,869 INFO L87 Difference]: Start difference. First operand 11260 states and 46217 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:38,361 INFO L93 Difference]: Finished difference Result 22298 states and 89003 transitions. [2021-06-12 21:28:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:28:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:38,409 INFO L225 Difference]: With dead ends: 22298 [2021-06-12 21:28:38,409 INFO L226 Difference]: Without dead ends: 22143 [2021-06-12 21:28:38,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:28:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22143 states. [2021-06-12 21:28:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22143 to 12043. [2021-06-12 21:28:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 4.112855007473842) internal successors, (49527), 12042 states have internal predecessors, (49527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 49527 transitions. [2021-06-12 21:28:38,660 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 49527 transitions. Word has length 34 [2021-06-12 21:28:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:38,660 INFO L482 AbstractCegarLoop]: Abstraction has 12043 states and 49527 transitions. [2021-06-12 21:28:38,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 49527 transitions. [2021-06-12 21:28:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:38,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:38,679 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:38,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:28:38,881 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1516120409, now seen corresponding path program 17 times [2021-06-12 21:28:38,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:38,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374962180] [2021-06-12 21:28:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:38,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:38,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374962180] [2021-06-12 21:28:38,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374962180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:38,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520609132] [2021-06-12 21:28:38,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:28:38,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:28:38,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:28:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:39,109 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-12 21:28:39,109 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 37 treesize of output 37 [2021-06-12 21:28:39,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:39,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:39,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:39,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:30 [2021-06-12 21:28:39,194 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 27 treesize of output 21 [2021-06-12 21:28:39,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:39,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:39,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:39,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-12 21:28:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:39,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520609132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:39,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:39,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:39,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419619967] [2021-06-12 21:28:39,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:39,219 INFO L87 Difference]: Start difference. First operand 12043 states and 49527 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:40,201 INFO L93 Difference]: Finished difference Result 36456 states and 147208 transitions. [2021-06-12 21:28:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:28:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-06-12 21:28:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:40,290 INFO L225 Difference]: With dead ends: 36456 [2021-06-12 21:28:40,290 INFO L226 Difference]: Without dead ends: 36381 [2021-06-12 21:28:40,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:28:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36381 states. [2021-06-12 21:28:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36381 to 13600. [2021-06-12 21:28:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13600 states, 13599 states have (on average 4.1242003088462384) internal successors, (56085), 13599 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13600 states to 13600 states and 56085 transitions. [2021-06-12 21:28:40,656 INFO L78 Accepts]: Start accepts. Automaton has 13600 states and 56085 transitions. Word has length 34 [2021-06-12 21:28:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:40,657 INFO L482 AbstractCegarLoop]: Abstraction has 13600 states and 56085 transitions. [2021-06-12 21:28:40,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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) [2021-06-12 21:28:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 13600 states and 56085 transitions. [2021-06-12 21:28:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:40,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:40,681 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:40,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:40,882 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1259464947, now seen corresponding path program 18 times [2021-06-12 21:28:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:40,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860251726] [2021-06-12 21:28:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:40,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:40,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860251726] [2021-06-12 21:28:40,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860251726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:40,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349481054] [2021-06-12 21:28:40,952 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 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 [2021-06-12 21:28:40,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:28:40,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:28:40,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:41,105 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 34 treesize of output 28 [2021-06-12 21:28:41,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:41,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:41,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:41,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-06-12 21:28:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:41,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:41,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 37 [2021-06-12 21:28:41,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:41,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:41,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:41,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-06-12 21:28:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:41,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349481054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:41,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:41,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:41,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263803702] [2021-06-12 21:28:41,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:41,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:41,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:41,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:41,203 INFO L87 Difference]: Start difference. First operand 13600 states and 56085 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:42,187 INFO L93 Difference]: Finished difference Result 26172 states and 105952 transitions. [2021-06-12 21:28:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:28:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:42,263 INFO L225 Difference]: With dead ends: 26172 [2021-06-12 21:28:42,263 INFO L226 Difference]: Without dead ends: 26057 [2021-06-12 21:28:42,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:28:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-06-12 21:28:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 13750. [2021-06-12 21:28:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13750 states, 13749 states have (on average 4.126918321332461) internal successors, (56741), 13749 states have internal predecessors, (56741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13750 states to 13750 states and 56741 transitions. [2021-06-12 21:28:42,574 INFO L78 Accepts]: Start accepts. Automaton has 13750 states and 56741 transitions. Word has length 34 [2021-06-12 21:28:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:42,574 INFO L482 AbstractCegarLoop]: Abstraction has 13750 states and 56741 transitions. [2021-06-12 21:28:42,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13750 states and 56741 transitions. [2021-06-12 21:28:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:42,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:42,597 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:42,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 21:28:42,797 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:42,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:42,798 INFO L82 PathProgramCache]: Analyzing trace with hash -756448751, now seen corresponding path program 19 times [2021-06-12 21:28:42,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:42,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28582743] [2021-06-12 21:28:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:42,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:42,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28582743] [2021-06-12 21:28:42,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28582743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:42,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462517747] [2021-06-12 21:28:42,872 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 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 [2021-06-12 21:28:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:42,996 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 26 treesize of output 20 [2021-06-12 21:28:42,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:43,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:43,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:43,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-06-12 21:28:43,047 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:43,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:43,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:43,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:43,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:43,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:43,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462517747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:43,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:43,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:43,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442257671] [2021-06-12 21:28:43,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:43,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:43,080 INFO L87 Difference]: Start difference. First operand 13750 states and 56741 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:43,603 INFO L93 Difference]: Finished difference Result 28454 states and 114913 transitions. [2021-06-12 21:28:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:28:43,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:43,671 INFO L225 Difference]: With dead ends: 28454 [2021-06-12 21:28:43,671 INFO L226 Difference]: Without dead ends: 28219 [2021-06-12 21:28:43,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:28:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28219 states. [2021-06-12 21:28:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28219 to 12943. [2021-06-12 21:28:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 4.129346314325452) internal successors, (53442), 12942 states have internal predecessors, (53442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 53442 transitions. [2021-06-12 21:28:43,974 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 53442 transitions. Word has length 34 [2021-06-12 21:28:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:43,974 INFO L482 AbstractCegarLoop]: Abstraction has 12943 states and 53442 transitions. [2021-06-12 21:28:43,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 53442 transitions. [2021-06-12 21:28:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:43,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:43,996 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:44,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:44,196 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:44,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1335361853, now seen corresponding path program 20 times [2021-06-12 21:28:44,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:44,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498177581] [2021-06-12 21:28:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:44,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:44,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498177581] [2021-06-12 21:28:44,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498177581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:44,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759027455] [2021-06-12 21:28:44,269 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 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 [2021-06-12 21:28:44,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:28:44,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:44,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:44,373 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 [2021-06-12 21:28:44,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:44,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:44,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:44,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-12 21:28:44,438 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:44,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:44,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:44,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:44,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:44,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759027455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:44,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:44,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:44,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406033845] [2021-06-12 21:28:44,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:44,462 INFO L87 Difference]: Start difference. First operand 12943 states and 53442 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:44,970 INFO L93 Difference]: Finished difference Result 23438 states and 94591 transitions. [2021-06-12 21:28:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:28:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:45,023 INFO L225 Difference]: With dead ends: 23438 [2021-06-12 21:28:45,024 INFO L226 Difference]: Without dead ends: 23283 [2021-06-12 21:28:45,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:28:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23283 states. [2021-06-12 21:28:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23283 to 13180. [2021-06-12 21:28:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13180 states, 13179 states have (on average 4.129524243114045) internal successors, (54423), 13179 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13180 states to 13180 states and 54423 transitions. [2021-06-12 21:28:45,307 INFO L78 Accepts]: Start accepts. Automaton has 13180 states and 54423 transitions. Word has length 34 [2021-06-12 21:28:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:45,307 INFO L482 AbstractCegarLoop]: Abstraction has 13180 states and 54423 transitions. [2021-06-12 21:28:45,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 13180 states and 54423 transitions. [2021-06-12 21:28:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:45,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:45,329 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:45,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-12 21:28:45,533 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash 53048833, now seen corresponding path program 21 times [2021-06-12 21:28:45,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:45,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149736517] [2021-06-12 21:28:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:45,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:45,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149736517] [2021-06-12 21:28:45,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149736517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:45,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164792723] [2021-06-12 21:28:45,599 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 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 [2021-06-12 21:28:45,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:28:45,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:28:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:45,692 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 [2021-06-12 21:28:45,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:45,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:45,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:45,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-06-12 21:28:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:45,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:45,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 37 [2021-06-12 21:28:45,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:45,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:45,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:45,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-06-12 21:28:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:45,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164792723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:45,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:45,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:45,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804514293] [2021-06-12 21:28:45,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:45,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:45,865 INFO L87 Difference]: Start difference. First operand 13180 states and 54423 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-06-12 21:28:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:46,614 INFO L93 Difference]: Finished difference Result 27881 states and 112706 transitions. [2021-06-12 21:28:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:28:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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 34 [2021-06-12 21:28:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:46,682 INFO L225 Difference]: With dead ends: 27881 [2021-06-12 21:28:46,682 INFO L226 Difference]: Without dead ends: 27646 [2021-06-12 21:28:46,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:28:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27646 states. [2021-06-12 21:28:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27646 to 13288. [2021-06-12 21:28:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13287 states have (on average 4.130879807330474) internal successors, (54887), 13287 states have internal predecessors, (54887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 54887 transitions. [2021-06-12 21:28:46,988 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 54887 transitions. Word has length 34 [2021-06-12 21:28:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:46,988 INFO L482 AbstractCegarLoop]: Abstraction has 13288 states and 54887 transitions. [2021-06-12 21:28:46,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-06-12 21:28:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 54887 transitions. [2021-06-12 21:28:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:47,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:47,010 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:47,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:47,211 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1169034441, now seen corresponding path program 22 times [2021-06-12 21:28:47,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:47,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489714994] [2021-06-12 21:28:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:47,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:47,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489714994] [2021-06-12 21:28:47,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489714994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:47,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015998625] [2021-06-12 21:28:47,403 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 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 [2021-06-12 21:28:47,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:28:47,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:47,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:47,531 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:47,531 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 44 treesize of output 26 [2021-06-12 21:28:47,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:47,538 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-12 21:28:47,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:47,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-12 21:28:47,570 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 15 treesize of output 11 [2021-06-12 21:28:47,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:47,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:47,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:47,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-12 21:28:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:47,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015998625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:47,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:47,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:47,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307066096] [2021-06-12 21:28:47,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:47,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:47,588 INFO L87 Difference]: Start difference. First operand 13288 states and 54887 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) [2021-06-12 21:28:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:48,059 INFO L93 Difference]: Finished difference Result 20392 states and 83172 transitions. [2021-06-12 21:28:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:28:48,060 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 34 [2021-06-12 21:28:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:48,110 INFO L225 Difference]: With dead ends: 20392 [2021-06-12 21:28:48,110 INFO L226 Difference]: Without dead ends: 20317 [2021-06-12 21:28:48,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:28:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2021-06-12 21:28:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 13899. [2021-06-12 21:28:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13899 states, 13898 states have (on average 4.1316736221039) internal successors, (57422), 13898 states have internal predecessors, (57422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13899 states to 13899 states and 57422 transitions. [2021-06-12 21:28:48,382 INFO L78 Accepts]: Start accepts. Automaton has 13899 states and 57422 transitions. Word has length 34 [2021-06-12 21:28:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:48,382 INFO L482 AbstractCegarLoop]: Abstraction has 13899 states and 57422 transitions. [2021-06-12 21:28:48,382 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) [2021-06-12 21:28:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13899 states and 57422 transitions. [2021-06-12 21:28:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:48,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:48,405 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:48,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:48,607 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -912378979, now seen corresponding path program 23 times [2021-06-12 21:28:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:48,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474754884] [2021-06-12 21:28:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:48,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474754884] [2021-06-12 21:28:48,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474754884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350906343] [2021-06-12 21:28:48,682 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 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 [2021-06-12 21:28:48,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:28:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:28:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:48,893 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 28 treesize of output 22 [2021-06-12 21:28:48,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:48,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:48,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 21:28:48,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:38 [2021-06-12 21:28:48,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:28:48,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:48,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 21:28:48,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:48,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:48,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:48,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:11 [2021-06-12 21:28:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:49,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350906343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:49,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:49,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:49,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436027710] [2021-06-12 21:28:49,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:49,025 INFO L87 Difference]: Start difference. First operand 13899 states and 57422 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:49,653 INFO L93 Difference]: Finished difference Result 29230 states and 119098 transitions. [2021-06-12 21:28:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:28:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:49,726 INFO L225 Difference]: With dead ends: 29230 [2021-06-12 21:28:49,726 INFO L226 Difference]: Without dead ends: 29115 [2021-06-12 21:28:49,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:28:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29115 states. [2021-06-12 21:28:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29115 to 13767. [2021-06-12 21:28:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13767 states, 13766 states have (on average 4.136713642307133) internal successors, (56946), 13766 states have internal predecessors, (56946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13767 states to 13767 states and 56946 transitions. [2021-06-12 21:28:50,057 INFO L78 Accepts]: Start accepts. Automaton has 13767 states and 56946 transitions. Word has length 34 [2021-06-12 21:28:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:50,057 INFO L482 AbstractCegarLoop]: Abstraction has 13767 states and 56946 transitions. [2021-06-12 21:28:50,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 13767 states and 56946 transitions. [2021-06-12 21:28:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:50,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:50,081 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:50,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:50,284 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash 607266957, now seen corresponding path program 24 times [2021-06-12 21:28:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:50,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600996232] [2021-06-12 21:28:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:50,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600996232] [2021-06-12 21:28:50,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600996232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565346917] [2021-06-12 21:28:50,370 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 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 [2021-06-12 21:28:50,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:28:50,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:50,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:28:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:50,485 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 19 treesize of output 15 [2021-06-12 21:28:50,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:50,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:50,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:50,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-06-12 21:28:50,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:50,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:50,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:50,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:50,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:50,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:50,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565346917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:50,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:50,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:50,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89464470] [2021-06-12 21:28:50,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:50,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:50,556 INFO L87 Difference]: Start difference. First operand 13767 states and 56946 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:50,931 INFO L93 Difference]: Finished difference Result 24762 states and 100856 transitions. [2021-06-12 21:28:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:28:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:50,992 INFO L225 Difference]: With dead ends: 24762 [2021-06-12 21:28:50,992 INFO L226 Difference]: Without dead ends: 24647 [2021-06-12 21:28:50,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:28:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24647 states. [2021-06-12 21:28:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24647 to 13308. [2021-06-12 21:28:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13308 states, 13307 states have (on average 4.129631021267002) internal successors, (54953), 13307 states have internal predecessors, (54953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13308 states to 13308 states and 54953 transitions. [2021-06-12 21:28:51,297 INFO L78 Accepts]: Start accepts. Automaton has 13308 states and 54953 transitions. Word has length 34 [2021-06-12 21:28:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:51,297 INFO L482 AbstractCegarLoop]: Abstraction has 13308 states and 54953 transitions. [2021-06-12 21:28:51,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 13308 states and 54953 transitions. [2021-06-12 21:28:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:51,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:51,319 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:51,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 21:28:51,520 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash -546754701, now seen corresponding path program 25 times [2021-06-12 21:28:51,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:51,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158390078] [2021-06-12 21:28:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158390078] [2021-06-12 21:28:51,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158390078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973594956] [2021-06-12 21:28:51,578 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:51,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:51,704 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:51,704 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 44 treesize of output 26 [2021-06-12 21:28:51,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:51,710 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-06-12 21:28:51,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:51,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-12 21:28:51,735 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 15 treesize of output 11 [2021-06-12 21:28:51,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:51,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:51,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:51,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-06-12 21:28:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:51,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973594956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:51,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:51,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:51,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641277132] [2021-06-12 21:28:51,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:51,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:51,754 INFO L87 Difference]: Start difference. First operand 13308 states and 54953 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) [2021-06-12 21:28:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:52,661 INFO L93 Difference]: Finished difference Result 30843 states and 125658 transitions. [2021-06-12 21:28:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:28:52,661 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 34 [2021-06-12 21:28:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:52,737 INFO L225 Difference]: With dead ends: 30843 [2021-06-12 21:28:52,737 INFO L226 Difference]: Without dead ends: 30768 [2021-06-12 21:28:52,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:28:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30768 states. [2021-06-12 21:28:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30768 to 14991. [2021-06-12 21:28:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 4.145030020013342) internal successors, (62134), 14990 states have internal predecessors, (62134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 62134 transitions. [2021-06-12 21:28:53,075 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 62134 transitions. Word has length 34 [2021-06-12 21:28:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:53,075 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 62134 transitions. [2021-06-12 21:28:53,075 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) [2021-06-12 21:28:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 62134 transitions. [2021-06-12 21:28:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:53,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:53,100 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:53,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:28:53,301 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:53,301 INFO L82 PathProgramCache]: Analyzing trace with hash -290099239, now seen corresponding path program 26 times [2021-06-12 21:28:53,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:53,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009793935] [2021-06-12 21:28:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:53,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:53,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009793935] [2021-06-12 21:28:53,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009793935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:53,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723835037] [2021-06-12 21:28:53,353 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 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 [2021-06-12 21:28:53,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:28:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:53,496 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 32 treesize of output 26 [2021-06-12 21:28:53,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:53,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:53,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:53,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-06-12 21:28:53,525 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:53,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:53,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:53,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:53,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:53,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:53,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723835037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:53,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:53,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:53,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698478761] [2021-06-12 21:28:53,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:53,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:53,546 INFO L87 Difference]: Start difference. First operand 14991 states and 62134 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:54,056 INFO L93 Difference]: Finished difference Result 28364 states and 115770 transitions. [2021-06-12 21:28:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:28:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:54,130 INFO L225 Difference]: With dead ends: 28364 [2021-06-12 21:28:54,130 INFO L226 Difference]: Without dead ends: 28249 [2021-06-12 21:28:54,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:28:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28249 states. [2021-06-12 21:28:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28249 to 14487. [2021-06-12 21:28:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14487 states, 14486 states have (on average 4.141930139444981) internal successors, (60000), 14486 states have internal predecessors, (60000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14487 states to 14487 states and 60000 transitions. [2021-06-12 21:28:54,481 INFO L78 Accepts]: Start accepts. Automaton has 14487 states and 60000 transitions. Word has length 34 [2021-06-12 21:28:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:54,481 INFO L482 AbstractCegarLoop]: Abstraction has 14487 states and 60000 transitions. [2021-06-12 21:28:54,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14487 states and 60000 transitions. [2021-06-12 21:28:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:54,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:54,507 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:54,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 21:28:54,708 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 212916957, now seen corresponding path program 27 times [2021-06-12 21:28:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:54,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118390687] [2021-06-12 21:28:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:54,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:54,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118390687] [2021-06-12 21:28:54,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118390687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:54,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060686695] [2021-06-12 21:28:54,762 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 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 [2021-06-12 21:28:54,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:28:54,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:54,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:28:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:54,888 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 26 treesize of output 20 [2021-06-12 21:28:54,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:54,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:54,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:54,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-06-12 21:28:54,937 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:28:54,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:28:54,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:54,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:54,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:54,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-12 21:28:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060686695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:54,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:54,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939507784] [2021-06-12 21:28:54,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:54,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:54,957 INFO L87 Difference]: Start difference. First operand 14487 states and 60000 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:55,473 INFO L93 Difference]: Finished difference Result 30736 states and 125294 transitions. [2021-06-12 21:28:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:28:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 21:28:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:55,555 INFO L225 Difference]: With dead ends: 30736 [2021-06-12 21:28:55,555 INFO L226 Difference]: Without dead ends: 30501 [2021-06-12 21:28:55,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:28:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30501 states. [2021-06-12 21:28:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30501 to 13662. [2021-06-12 21:28:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13661 states have (on average 4.144498938584291) internal successors, (56618), 13661 states have internal predecessors, (56618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 56618 transitions. [2021-06-12 21:28:55,908 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 56618 transitions. Word has length 34 [2021-06-12 21:28:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:55,908 INFO L482 AbstractCegarLoop]: Abstraction has 13662 states and 56618 transitions. [2021-06-12 21:28:55,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 56618 transitions. [2021-06-12 21:28:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:55,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:55,932 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:56,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 21:28:56,133 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1990239735, now seen corresponding path program 28 times [2021-06-12 21:28:56,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:56,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84827917] [2021-06-12 21:28:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:56,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:56,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84827917] [2021-06-12 21:28:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84827917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:56,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419078546] [2021-06-12 21:28:56,201 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 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 [2021-06-12 21:28:56,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:28:56,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:28:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:56,294 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 [2021-06-12 21:28:56,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:56,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:56,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:56,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-12 21:28:56,377 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:56,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:56,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:56,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:56,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:56,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:56,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419078546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:56,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:56,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:56,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905360770] [2021-06-12 21:28:56,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:56,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:56,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:56,402 INFO L87 Difference]: Start difference. First operand 13662 states and 56618 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:56,967 INFO L93 Difference]: Finished difference Result 24729 states and 99644 transitions. [2021-06-12 21:28:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:28:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:28:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:57,028 INFO L225 Difference]: With dead ends: 24729 [2021-06-12 21:28:57,028 INFO L226 Difference]: Without dead ends: 24574 [2021-06-12 21:28:57,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:28:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24574 states. [2021-06-12 21:28:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24574 to 13674. [2021-06-12 21:28:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13674 states, 13673 states have (on average 4.145103488627221) internal successors, (56676), 13673 states have internal predecessors, (56676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 56676 transitions. [2021-06-12 21:28:57,480 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 56676 transitions. Word has length 34 [2021-06-12 21:28:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:57,480 INFO L482 AbstractCegarLoop]: Abstraction has 13674 states and 56676 transitions. [2021-06-12 21:28:57,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 56676 transitions. [2021-06-12 21:28:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:57,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:57,505 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:57,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 21:28:57,705 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1022414541, now seen corresponding path program 29 times [2021-06-12 21:28:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:57,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007069745] [2021-06-12 21:28:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:57,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:57,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007069745] [2021-06-12 21:28:57,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007069745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62823542] [2021-06-12 21:28:57,768 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 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 [2021-06-12 21:28:57,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:28:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:28:57,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:57,866 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 [2021-06-12 21:28:57,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:57,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:57,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:57,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-12 21:28:57,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:57,935 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 13 treesize of output 17 [2021-06-12 21:28:57,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:28:57,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:57,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:28:57,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-06-12 21:28:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:57,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62823542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:57,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:57,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:28:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707979686] [2021-06-12 21:28:57,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:28:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:28:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:28:57,987 INFO L87 Difference]: Start difference. First operand 13674 states and 56676 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-06-12 21:28:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:28:58,966 INFO L93 Difference]: Finished difference Result 37613 states and 152667 transitions. [2021-06-12 21:28:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:28:58,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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 34 [2021-06-12 21:28:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:28:59,067 INFO L225 Difference]: With dead ends: 37613 [2021-06-12 21:28:59,067 INFO L226 Difference]: Without dead ends: 37323 [2021-06-12 21:28:59,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:28:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37323 states. [2021-06-12 21:28:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37323 to 14150. [2021-06-12 21:28:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14150 states, 14149 states have (on average 4.154003816524136) internal successors, (58775), 14149 states have internal predecessors, (58775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:28:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14150 states to 14150 states and 58775 transitions. [2021-06-12 21:28:59,485 INFO L78 Accepts]: Start accepts. Automaton has 14150 states and 58775 transitions. Word has length 34 [2021-06-12 21:28:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:28:59,485 INFO L482 AbstractCegarLoop]: Abstraction has 14150 states and 58775 transitions. [2021-06-12 21:28:59,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-06-12 21:28:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 14150 states and 58775 transitions. [2021-06-12 21:28:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:28:59,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:28:59,510 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:28:59,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-12 21:28:59,711 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:28:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:28:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1427456559, now seen corresponding path program 30 times [2021-06-12 21:28:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:28:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580585833] [2021-06-12 21:28:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:28:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:59,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:59,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580585833] [2021-06-12 21:28:59,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580585833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:59,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959132667] [2021-06-12 21:28:59,772 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 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 [2021-06-12 21:28:59,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:28:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:28:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:59,851 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 [2021-06-12 21:28:59,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:59,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:59,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:59,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-12 21:28:59,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:28:59,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:28:59,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:59,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:59,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:59,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:28:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:59,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959132667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:59,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:59,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:28:59,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289347548] [2021-06-12 21:28:59,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:28:59,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:28:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:28:59,949 INFO L87 Difference]: Start difference. First operand 14150 states and 58775 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:00,307 INFO L93 Difference]: Finished difference Result 22775 states and 92502 transitions. [2021-06-12 21:29:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:29:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:29:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:00,361 INFO L225 Difference]: With dead ends: 22775 [2021-06-12 21:29:00,362 INFO L226 Difference]: Without dead ends: 22620 [2021-06-12 21:29:00,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:29:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-06-12 21:29:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 14182. [2021-06-12 21:29:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 4.154502503349552) internal successors, (58915), 14181 states have internal predecessors, (58915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 58915 transitions. [2021-06-12 21:29:00,665 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 58915 transitions. Word has length 34 [2021-06-12 21:29:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:00,665 INFO L482 AbstractCegarLoop]: Abstraction has 14182 states and 58915 transitions. [2021-06-12 21:29:00,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 58915 transitions. [2021-06-12 21:29:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:29:00,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:00,690 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:00,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 21:29:00,891 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1674195085, now seen corresponding path program 31 times [2021-06-12 21:29:00,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:00,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000565871] [2021-06-12 21:29:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:00,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:00,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000565871] [2021-06-12 21:29:00,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000565871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:00,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387054803] [2021-06-12 21:29:00,945 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 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 [2021-06-12 21:29:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:29:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:01,018 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 [2021-06-12 21:29:01,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:01,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:01,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:01,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-12 21:29:01,108 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:29:01,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:29:01,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:01,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:01,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:01,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:29:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387054803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:01,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:29:01,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:29:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494056393] [2021-06-12 21:29:01,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:29:01,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:01,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:29:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:29:01,156 INFO L87 Difference]: Start difference. First operand 14182 states and 58915 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:01,568 INFO L93 Difference]: Finished difference Result 27396 states and 111149 transitions. [2021-06-12 21:29:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:29:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:29:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:01,637 INFO L225 Difference]: With dead ends: 27396 [2021-06-12 21:29:01,638 INFO L226 Difference]: Without dead ends: 27241 [2021-06-12 21:29:01,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:29:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-06-12 21:29:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 14407. [2021-06-12 21:29:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 4.153685964181591) internal successors, (59838), 14406 states have internal predecessors, (59838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 59838 transitions. [2021-06-12 21:29:01,996 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 59838 transitions. Word has length 34 [2021-06-12 21:29:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:01,997 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 59838 transitions. [2021-06-12 21:29:01,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 59838 transitions. [2021-06-12 21:29:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:29:02,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:02,025 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:02,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 21:29:02,225 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash -140783524, now seen corresponding path program 6 times [2021-06-12 21:29:02,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:02,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73816044] [2021-06-12 21:29:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:02,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:02,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73816044] [2021-06-12 21:29:02,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73816044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:02,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768145606] [2021-06-12 21:29:02,303 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 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 [2021-06-12 21:29:02,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:29:02,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:29:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:29:02,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:02,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768145606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:02,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:29:02,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-12 21:29:02,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476103989] [2021-06-12 21:29:02,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:29:02,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:29:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:29:02,385 INFO L87 Difference]: Start difference. First operand 14407 states and 59838 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-06-12 21:29:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:02,600 INFO L93 Difference]: Finished difference Result 22943 states and 94680 transitions. [2021-06-12 21:29:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:29:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 36 [2021-06-12 21:29:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:02,655 INFO L225 Difference]: With dead ends: 22943 [2021-06-12 21:29:02,655 INFO L226 Difference]: Without dead ends: 22609 [2021-06-12 21:29:02,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:29:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-06-12 21:29:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 20569. [2021-06-12 21:29:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20569 states, 20568 states have (on average 4.176244651886425) internal successors, (85897), 20568 states have internal predecessors, (85897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 85897 transitions. [2021-06-12 21:29:03,026 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 85897 transitions. Word has length 36 [2021-06-12 21:29:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:03,026 INFO L482 AbstractCegarLoop]: Abstraction has 20569 states and 85897 transitions. [2021-06-12 21:29:03,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-06-12 21:29:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 85897 transitions. [2021-06-12 21:29:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:29:03,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:03,063 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:03,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 21:29:03,263 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1416997327, now seen corresponding path program 32 times [2021-06-12 21:29:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:03,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715778426] [2021-06-12 21:29:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:29:03,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715778426] [2021-06-12 21:29:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715778426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:29:03,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:29:03,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:29:03,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918118723] [2021-06-12 21:29:03,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:29:03,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:03,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:29:03,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:29:03,282 INFO L87 Difference]: Start difference. First operand 20569 states and 85897 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 21:29:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:03,469 INFO L93 Difference]: Finished difference Result 37535 states and 156218 transitions. [2021-06-12 21:29:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:29:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 36 [2021-06-12 21:29:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:03,583 INFO L225 Difference]: With dead ends: 37535 [2021-06-12 21:29:03,583 INFO L226 Difference]: Without dead ends: 36829 [2021-06-12 21:29:03,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:29:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36829 states. [2021-06-12 21:29:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36829 to 33540. [2021-06-12 21:29:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33540 states, 33539 states have (on average 4.207489788007991) internal successors, (141115), 33539 states have internal predecessors, (141115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33540 states to 33540 states and 141115 transitions. [2021-06-12 21:29:04,240 INFO L78 Accepts]: Start accepts. Automaton has 33540 states and 141115 transitions. Word has length 36 [2021-06-12 21:29:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:04,240 INFO L482 AbstractCegarLoop]: Abstraction has 33540 states and 141115 transitions. [2021-06-12 21:29:04,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 21:29:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 33540 states and 141115 transitions. [2021-06-12 21:29:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:29:04,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:04,303 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:04,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-12 21:29:04,303 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash -656275528, now seen corresponding path program 7 times [2021-06-12 21:29:04,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:04,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107484644] [2021-06-12 21:29:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:04,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:04,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107484644] [2021-06-12 21:29:04,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107484644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:04,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149744312] [2021-06-12 21:29:04,394 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 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 [2021-06-12 21:29:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:29:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:04,630 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:29:04,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-06-12 21:29:04,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:04,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:04,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:04,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:3 [2021-06-12 21:29:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:04,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149744312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:04,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:29:04,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:29:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770577391] [2021-06-12 21:29:04,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:29:04,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:29:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:29:04,658 INFO L87 Difference]: Start difference. First operand 33540 states and 141115 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:05,670 INFO L93 Difference]: Finished difference Result 59772 states and 246214 transitions. [2021-06-12 21:29:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:29:05,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:29:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:05,846 INFO L225 Difference]: With dead ends: 59772 [2021-06-12 21:29:05,846 INFO L226 Difference]: Without dead ends: 58808 [2021-06-12 21:29:05,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:29:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58808 states. [2021-06-12 21:29:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58808 to 33468. [2021-06-12 21:29:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33468 states, 33467 states have (on average 4.193265007320644) internal successors, (140336), 33467 states have internal predecessors, (140336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33468 states to 33468 states and 140336 transitions. [2021-06-12 21:29:06,911 INFO L78 Accepts]: Start accepts. Automaton has 33468 states and 140336 transitions. Word has length 39 [2021-06-12 21:29:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:06,911 INFO L482 AbstractCegarLoop]: Abstraction has 33468 states and 140336 transitions. [2021-06-12 21:29:06,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 33468 states and 140336 transitions. [2021-06-12 21:29:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:29:06,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:06,974 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:07,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:29:07,175 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1022951253, now seen corresponding path program 33 times [2021-06-12 21:29:07,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:07,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947861304] [2021-06-12 21:29:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:07,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:07,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947861304] [2021-06-12 21:29:07,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947861304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083424498] [2021-06-12 21:29:07,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:29:07,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:29:07,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:29:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:29:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:07,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:07,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:07,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:07,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:07,501 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 38 treesize of output 46 [2021-06-12 21:29:07,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 21:29:07,567 INFO L628 ElimStorePlain]: treesize reduction 55, result has 42.1 percent of original size [2021-06-12 21:29:07,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:07,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:38 [2021-06-12 21:29:07,660 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 27 treesize of output 21 [2021-06-12 21:29:07,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:07,666 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-06-12 21:29:07,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:07,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-12 21:29:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:07,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083424498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:07,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:29:07,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 21:29:07,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183817928] [2021-06-12 21:29:07,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:29:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:29:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:29:07,698 INFO L87 Difference]: Start difference. First operand 33468 states and 140336 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:10,584 INFO L93 Difference]: Finished difference Result 77832 states and 316391 transitions. [2021-06-12 21:29:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:29:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:29:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:10,823 INFO L225 Difference]: With dead ends: 77832 [2021-06-12 21:29:10,823 INFO L226 Difference]: Without dead ends: 77444 [2021-06-12 21:29:10,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1535.0ms TimeCoverageRelationStatistics Valid=551, Invalid=3109, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:29:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77444 states. [2021-06-12 21:29:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77444 to 34685. [2021-06-12 21:29:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34685 states, 34684 states have (on average 4.195969323030792) internal successors, (145533), 34684 states have internal predecessors, (145533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34685 states to 34685 states and 145533 transitions. [2021-06-12 21:29:12,096 INFO L78 Accepts]: Start accepts. Automaton has 34685 states and 145533 transitions. Word has length 39 [2021-06-12 21:29:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:12,096 INFO L482 AbstractCegarLoop]: Abstraction has 34685 states and 145533 transitions. [2021-06-12 21:29:12,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 34685 states and 145533 transitions. [2021-06-12 21:29:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:29:12,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:12,162 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:12,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 21:29:12,362 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1976270763, now seen corresponding path program 34 times [2021-06-12 21:29:12,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:12,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938280359] [2021-06-12 21:29:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:12,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938280359] [2021-06-12 21:29:12,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938280359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231627281] [2021-06-12 21:29:12,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:29:12,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:29:12,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:29:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:29:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:12,969 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:29:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-06-12 21:29:12,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:12,976 INFO L628 ElimStorePlain]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 21:29:12,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:12,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:13 [2021-06-12 21:29:13,002 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 [2021-06-12 21:29:13,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:13,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:13,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:29:13,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-06-12 21:29:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:13,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231627281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:13,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:29:13,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:29:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3701042] [2021-06-12 21:29:13,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:29:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:29:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:29:13,036 INFO L87 Difference]: Start difference. First operand 34685 states and 145533 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:14,761 INFO L93 Difference]: Finished difference Result 85928 states and 351701 transitions. [2021-06-12 21:29:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:29:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:29:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:15,123 INFO L225 Difference]: With dead ends: 85928 [2021-06-12 21:29:15,123 INFO L226 Difference]: Without dead ends: 85554 [2021-06-12 21:29:15,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:29:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85554 states. [2021-06-12 21:29:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85554 to 35149. [2021-06-12 21:29:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35149 states, 35148 states have (on average 4.186383293501764) internal successors, (147143), 35148 states have internal predecessors, (147143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35149 states to 35149 states and 147143 transitions. [2021-06-12 21:29:16,447 INFO L78 Accepts]: Start accepts. Automaton has 35149 states and 147143 transitions. Word has length 39 [2021-06-12 21:29:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:16,447 INFO L482 AbstractCegarLoop]: Abstraction has 35149 states and 147143 transitions. [2021-06-12 21:29:16,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 35149 states and 147143 transitions. [2021-06-12 21:29:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:29:16,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:16,517 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:16,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:29:16,717 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1473061487, now seen corresponding path program 35 times [2021-06-12 21:29:16,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:16,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966761153] [2021-06-12 21:29:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:16,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:16,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966761153] [2021-06-12 21:29:16,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966761153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:16,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173966666] [2021-06-12 21:29:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:29:16,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:29:16,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:29:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:29:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:17,189 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 26 treesize of output 22 [2021-06-12 21:29:17,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:29:17,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:17,197 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. [2021-06-12 21:29:17,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-06-12 21:29:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:17,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:17,265 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 48 treesize of output 88 [2021-06-12 21:29:17,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:29:17,371 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.1 percent of original size [2021-06-12 21:29:17,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:29:17,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:35 [2021-06-12 21:29:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:17,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173966666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:17,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:29:17,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 21:29:17,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590686617] [2021-06-12 21:29:17,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:29:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:29:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:29:17,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:29:17,428 INFO L87 Difference]: Start difference. First operand 35149 states and 147143 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:29:20,764 INFO L93 Difference]: Finished difference Result 130493 states and 529008 transitions. [2021-06-12 21:29:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:29:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:29:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:29:21,358 INFO L225 Difference]: With dead ends: 130493 [2021-06-12 21:29:21,358 INFO L226 Difference]: Without dead ends: 130135 [2021-06-12 21:29:21,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2030.2ms TimeCoverageRelationStatistics Valid=711, Invalid=3449, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:29:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130135 states. [2021-06-12 21:29:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130135 to 38584. [2021-06-12 21:29:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38583 states have (on average 4.202705854910193) internal successors, (162153), 38583 states have internal predecessors, (162153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 162153 transitions. [2021-06-12 21:29:23,330 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 162153 transitions. Word has length 39 [2021-06-12 21:29:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:29:23,330 INFO L482 AbstractCegarLoop]: Abstraction has 38584 states and 162153 transitions. [2021-06-12 21:29:23,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:29:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 162153 transitions. [2021-06-12 21:29:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:29:23,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:29:23,403 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:29:23,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 21:29:23,605 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:29:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:29:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -497015271, now seen corresponding path program 36 times [2021-06-12 21:29:23,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:29:23,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607542211] [2021-06-12 21:29:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:29:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:29:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:29:23,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:29:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607542211] [2021-06-12 21:29:23,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607542211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:29:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149619624] [2021-06-12 21:29:23,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:29:23,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:29:23,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:29:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:29:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:29:23,896 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 21:29:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:29:24,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:29:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2021-06-12 21:29:24,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:29:24,136 INFO L628 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-06-12 21:29:24,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:29:24,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:36 [2021-06-12 21:29:24,216 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 101 treesize of output 79 [2021-06-12 21:29:25,294 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 1669 DAG size of output: 1673 Received shutdown request... [2021-06-12 21:42:45,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:45,594 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:42:45,595 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:42:45,597 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:42:45,597 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:42:45 BasicIcfg [2021-06-12 21:42:45,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:42:45,597 INFO L168 Benchmark]: Toolchain (without parser) took 875714.09 ms. Allocated memory was 190.8 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 169.8 MB in the beginning and 3.9 GB in the end (delta: -3.7 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-06-12 21:42:45,597 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory was 171.0 MB in the beginning and 170.9 MB in the end (delta: 85.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:42:45,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.24 ms. Allocated memory is still 190.8 MB. Free memory was 169.7 MB in the beginning and 168.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 21:42:45,597 INFO L168 Benchmark]: Boogie Preprocessor took 12.30 ms. Allocated memory is still 190.8 MB. Free memory was 168.2 MB in the beginning and 167.3 MB in the end (delta: 961.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:42:45,597 INFO L168 Benchmark]: RCFGBuilder took 351.27 ms. Allocated memory is still 190.8 MB. Free memory was 167.2 MB in the beginning and 151.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-06-12 21:42:45,598 INFO L168 Benchmark]: TraceAbstraction took 875323.54 ms. Allocated memory was 190.8 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 151.3 MB in the beginning and 3.9 GB in the end (delta: -3.8 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-06-12 21:42:45,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory was 171.0 MB in the beginning and 170.9 MB in the end (delta: 85.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.24 ms. Allocated memory is still 190.8 MB. Free memory was 169.7 MB in the beginning and 168.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.30 ms. Allocated memory is still 190.8 MB. Free memory was 168.2 MB in the beginning and 167.3 MB in the end (delta: 961.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 351.27 ms. Allocated memory is still 190.8 MB. Free memory was 167.2 MB in the beginning and 151.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 875323.54 ms. Allocated memory was 190.8 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 151.3 MB in the beginning and 3.9 GB in the end (delta: -3.8 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 875206.1ms, OverallIterations: 46, TraceHistogramMax: 4, EmptinessCheckTime: 1062.3ms, AutomataDifference: 33395.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5227 SDtfs, 12873 SDslu, 41232 SDs, 0 SdLazy, 24208 SolverSat, 977 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9952.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2095 GetRequests, 1110 SyntacticMatches, 28 SemanticMatches, 957 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5590 ImplicationChecksByTransitivity, 16147.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38584occurred in iteration=45, InterpolantAutomatonStates: 753, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16936.8ms AutomataMinimizationTime, 45 MinimizatonAttempts, 608446 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 252.8ms SsaConstructionTime, 694.6ms SatisfiabilityAnalysisTime, 11112.0ms InterpolantComputationTime, 2842 NumberOfCodeBlocks, 2842 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 2756 ConstructedInterpolants, 39 QuantifiedInterpolants, 31842 SizeOfPredicates, 174 NumberOfNonLiveVariables, 4274 ConjunctsInSsa, 740 ConjunctsInUnsatCore, 86 InterpolantComputations, 5 PerfectInterpolantSequences, 117/1021 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown